concatenate divisors: A037278 *
concatenate prime factors: A037276 *, A048595 * (base 2)
concatenation of all numbers up through n, see here
conditionally convergent series: A002387 , A092324 , A092267 , A092753
conference matrices: see matrices, conference
configurations (combinatorial or geometrical): A001403 * A099999 A023994 A005787 A000698 A100001 A098702 A098804 A098822 A098841 A098851 A098852 A098854
Congruence property:: A002703 , A002704 , A002705
Congruences:: A001915 , A001916
congruent numbers: A003273 *, A006991 , A016090
congruent products between domains N and GF(2)[X] , sequences defined by (start): (Here * stands for ordinary multiplication (A004247 ), and X means carryless GF(2)[X] multiplication (A048720 ))
congruent products between domains N and GF(2)[X], 3*n = 3Xn (A003714 ), 3*n = 7Xn (A048717 ), 3*n = 7Xn and 5*n = 5Xn (A048719 )
congruent products between domains N and GF(2)[X], 5*n = 5Xn (A048716 ), 7*n = 7Xn (A048715 ), 7*n = 11Xn (A115770 )
congruent products between domains N and GF(2)[X], 9*n = 9Xn (A115845 ), 9*n = 25Xn (A115801 ), 9*n = 25Xn, but 17*n is not 49Xn (A115811 )
congruent products between domains N and GF(2)[X], 11*n = 31Xn (A115803 ), 13*n = 21Xn (A115772 ), 13*n = 29Xn (A115805 )
congruent products between domains N and GF(2)[X], 15*n = 15Xn (A048718 ), 15*n = 23Xn (A115774 ), 15*n = 27Xn (A115807 )
congruent products between domains N and GF(2)[X], 17*n = 17Xn (A115847 ), 17*n = 49Xn (A115809 ), 19*n = 55Xn (A115874 )
congruent products between domains N and GF(2)[X], 21*n = 21Xn (A115422 ), 31*n = 31Xn (A115423 ), 33*n = 33Xn (A114086 )
congruent products between domains N and GF(2)[X], 41*n = 105Xn (A115876 ), 49*n = 81Xn (A114384 ), 57*n = 73Xn (A114386 )
congruent products between domains N and GF(2)[X], 63*n = 63Xn (A115424 )
congruent products between domains N and GF(2)[X], array of solutions for n*k = A065621 (n) X k: A115872
congruent products between domains N and GF(2)[X], see also, A115857 , A115871 .
congruent products between domains N and GF(2)[X]: see also congruent products under XOR
congruent products under XOR , sequences defined by (start):
congruent products under XOR, 3*n = 2*n XOR n (A003714 ), 5*n = 4*n XOR n (A048716 ), 5*n = 3*n XOR 2*n (A115767 )
congruent products under XOR, 7*n = 6*n XOR n (A048715 ), 7*n = 5*n XOR 2*n (A115813 ), 7*n = 4*n XOR 3*n (A048715 )
congruent products under XOR, 11*n = 10*n XOR n (A115793 ), 11*n = 9*n XOR 2*n (A115795 ), 11*n = 8*n XOR 3*n (A115797 )
congruent products under XOR, 11*n = 7*n XOR 4*n (A115799 ), 11*n = 6*n XOR 5*n (A115827 ), 15*n = 14*n XOR n (A048718 )
congruent products under XOR, 17*n = 16*n XOR n (A115847 ), 17*n = 13*n XOR 4*n (A115817 ), 19*n = 15*n XOR 4*n (A115819 )
congruent products under XOR, 21*n = 20*n XOR n (A115422 ), 21*n = 15*n XOR 6*n (A115821 ), 21*n = 11*n XOR 10*n (A115829 )
congruent products under XOR, 23*n = 13*n XOR 8*n (A115823 ), 25*n = 16*n XOR 9*n (A115831 ), 33*n = 17*n XOR 16*n (A115833 )
congruent products under XOR, 31*n = 30*n XOR n (A115423 ), 33*n = 32*n XOR n (A114086 ), 63*n = 62*n XOR n (A115424 )
congruent products under XOR, 9*n = 8*n XOR n (A115845 ), 9*n = 7*n XOR 2*n (A115815 )
congruent products under XOR, least k such that n XOR n*2^k = n*(2^k + 1), A116361
congruent products under XOR: see also congruent products between domains N and GF(2)[X]
conjectured sequences (00): The following sequences contain one or more terms that are only conjectured values.
conjectured sequences (01): In some cases the conjectured terms are only mentioned in the comments.
conjectured sequences (02): This list was created on Aug 23 2006. It is surely incomplete, and by the time you look at them their status may have changed.
conjectured sequences (03): Suggestions for additions to or deletions from this list will be welcomed - njas@research.att.com
conjectured sequences (04): A008892 , A098007 , A063769 and other sequences related to the "aliquot divisors" problem
conjectured sequences (05): A065083 , A090315 , A104885 , A121091 , A051346 , A115016
conjectured sequences (06): A075788 , A075789 , A075790 , A075791 , A083435 , A086548 , A087318 , A087319 , A088126 , A090315 , A092959
conjectured sequences (07): A000373 , A002149 , A014595 , A014596 , A019450 , A019459 , A020999 ,
conjectured sequences (08): A022495 -A022498 , A023054 , A023108 , A038552 , A046125 , A052131 ,
conjectured sequences (09): A066426 , A066435 , A066450 , A066510 , A066746 , A066817 , A067579 ,
conjectured sequences (10): A068591 , A071071 , A071887 , A072023 , A072326 , A072540 , A074980 ,
conjectured sequences (11): A074981 , A078693 , A078754 , A078869 , A079098 , A079398 , A079611 ,
conjectured sequences (12): A080131 , A080133 , A080134 , A080761 , A080762 , A085508 , A086058 ,
conjectured sequences (13): A086748 , A087092 , A088910 , A091305 , A092372 -A092382 , A096340 ,
conjectured sequences (14): A098860 , A099118 , A099119 , A105233 , A105600 , A105601 , A108795 ,
conjectured sequences (15): A110000 , A110108 , A110172 , A110222 , A110223 , A110312 , A110356 ,
conjectured sequences (16): A112647 , A112799 , A112826 , A118278 -A118285 , A120414 *, A121069 ,
conjectured sequences (17): A121346 , A121507 , A121508 , A119479 , A009287 , A090997 , A090987
conjectured sequences (18): A004137 , A048873 , A056287 , A059813 , A059817 , A059818 , A065106 , A065107 , A081082 , A084619 , A090659 , A099260 , A117342 .
conjectured sequences (19): A000954 , A000974 , A007008 (?), A023189 -A023193 , A036462 -A036463 , A037018 , A039508 , A039515 , A051522 , A056636 , A076853 , A105170 , A118371 .
conjectured sequences (20): A080803 , A124484 , A093486
conjectures: see also Artin's conjecture ; Catalan's conjecture; Chvatal conjecture; complete graph conjecture; Gilbreath's conjecture; Goldbach conjecture ; Heawood conjecture; Kummer's conjecture; Legendre's conjecture; Mertens's conjecture; permutations of the integers, conjectured; Polya's conjecture.
conjectures: see also sequences that need extending
conjugacy classes of groups: see groups, conjugacy classes
connected regular graphs, see graphs, regular connected
connecting 2n points: A006605
Connell sequence: A001614 *
Consecutive:: A002308 , A001223 , A007610 , A002307 , A007513 , A000236 , A007667 , A006889 , A001033 , A006055
Consistent:: A005779 , A001225
constant, Robbins: A073012
constructing numbers from other numbers and the operations of addition, subtraction, etc: see under four 4's problem
contexts: A047684
CONTINUANT transform: see Transforms file
continuant: A072347
Continued cotangents:: A002668 , A006266 , A006268 , A002667 , A006267 , A002666 , A006269
continued fraction for sqrt(n), length of period: A003285 *, A097853
continued fractions (1):: A003285 , A006466 , A002951 , A003417 , A002852 , A002211 , A006083 , A006839 , A002947 , A002948
continued fractions (2):: A002946 , A001685 , A001686 , A004200 , A002665 , A006271 , A001684 , A006085 , A002945 , A007515
continued fractions (3):: A002937 , A001112 , A006464 , A003118 , A001203 , A006273 , A006270 , A002949 , A006467 , A003117
continued fractions (4):: A006221 , A002950 , A001204 , A006084 , A005483 , A006518 , A005147 , A006272 , A006274 , A005146 , A006465
continued fractions for constants , (start):
continued fractions for constants: (2/Pi)*Integral(sin(x)/x, x=0..Pi) (A036791 ), 0.12112111211112... A042974 (A056030 ) Product_{k>=1} (1-1/2^k) (A048652 )
continued fractions for constants: 2^(1/3) (A002945 ), 3^(1/3) (A002946 ), 4^(1/3) (A002947 ), 5^(1/3) (A002948 ), 6^(1/3) (A002949 ), 7^(1/3) (A005483 ), cube root of non-cubes 9+n to 100 (A010239 , A010240 , etc)
continued fractions for constants: 2^(1/3)+sqrt(3) (A039923 ), BesselK(1,2)/BesselK(0,2) (A051149 ), Catalan's constant (A014538 )
continued fractions for constants: 2^(1/5) (A002950 ), 3^(1/5) (A003117 ), 4^(1/5) (A003118 ), 5^(1/5) (A002951 )
continued fractions for constants: Champernowne (A030167 ), Conway's (A014967 ), Copeland-Erdos (A030168 ), Euler's gamma (A002852 )
continued fractions for constants: e (A003417 ), e/2 (A006083 ), e/3 (A006084 ), e/4 (A006085 ), e^2 (A001204 ), e^3 (A058282 )
continued fractions for constants: e^Pi (A058287 ), e^pi - pi (A018939 ), (e+1)/3 (A028360 ), (e-1)/(e+1) (A016825 ), i^i = exp(-Pi/2) (A049007 )
continued fractions for constants: Fransen-Robinson (A046943 ), GAMMA(1/3) (A030651 ), GAMMA(2/3) (A030652 ), Integral(sin(x)/x, x=0..Pi) (A036790 )
continued fractions for constants: golden ratio (A000012 )
continued fractions for constants: Khintchine's (A002211 ), LambertW(1) (A030179 ), Lehmer's (A002665 ), Liouville's A012245 (A058304 ), Niven's (A033151 )
continued fractions for constants: ln(2+n) to ln(100) (A016730 +n), ln((2n+1)/2) to ln(99/2) (A016528 +n)
continued fractions for constants: M(1,sqrt(2)) (A053003 ), 1 / M(1,sqrt(2)) (A053002 ), 1 +1/(e +1/(e^2 +..)) (A055972 ), 2*cos(2*Pi/7) (A039921 )
continued fractions for constants: Otter's rooted tree A000081 (A051492 ), Thue-Morse (A014572 ), Tribonacci constant (A019712 , A058296 )
continued fractions for constants: Pi (A001203 ), 2 Pi (A058291 ), Pi/2 (A053300 ), Pi^2 (A058284 ), Pi^e (A058288 ), pi+e (A058651 )
continued fractions for constants: sqrt(2Pi) (A058293 ), sqrt(Pi) (A058280 ), sqrt(e) (A058281 )
continued fractions for constants: sqrt(3) - 1: A134451 , A048878 /A002530
continued fractions for constants: sqrt(3): A040001 , A002531 /A002530
continued fractions for constants: square roots of 17 (A040012 ), 18 (A040013 ), 19 (A010124 ), 20 (A040015 ), 21 (A010125 ), 22 (A010126 ), 23 (A010127 ), 24 (A040019 ), 26 (A040020 ), 27 (A040021 ), 28 (A040022 ), 29 (A010128 ),
continued fractions for constants: square roots of 2 (A040000 ) and A001333 /A000129 , 3 (A040001 ), 5 (A040002 ), 6 (A040003 ), 7 (A010121 ), 8 (A040005 ), 10 (A040006 ), 11 (A040007 ), 12 (A040008 ), 13 (A010122 ), 14 (A010123 ), 15 (A040011 ),
continued fractions for constants: square roots of 30 (A040024 ), 31 (A010129 ), 32 (A010130 ), 33 (A010131 ), 34 (A010132 ), 35 (A040029 ), 37 (A040030 ), 38 (A040031 ), 39 (A040032 ), 40 (A040033 ), 41 (A010133 ), 42 (A040035 ),
continued fractions for constants: square roots of 43 (A010134 ), 44 (A040037 ), 45 (A010135 ), 46 (A010136 ), 47 (A010137 ), 48 (A040041 ), 50 (A040042 ), 51 (A040043 ), 52 (A010138 ), 53 (A010139 ), 54 (A010140 ), 55 (A010141 ),
continued fractions for constants: square roots of 56 (A040048 ), 57 (A010142 ), 58 (A010143 ), 59 (A010144 ), 60 (A040052 ), 61 (A010145 ), 62 (A010146 ), 63 (A040055 ), 65 (A040056 ), 66 (A040057 ), 67 (A010147 ), 68 (A040059 ),
continued fractions for constants: square roots of 69 (A010148 ), 70 (A010149 ), 71 (A010150 ), 72 (A040063 ), 73 (A010151 ), 74 (A010152 ), 75 (A010153 ), 76 (A010154 ), 77 (A010155 ), 78 (A010156 ), 79 (A010157 ), 80 (A040071 ),
continued fractions for constants: square roots of 82 (A040072 ), 83 (A040073 ), 84 (A040074 ), 85 (A010158 ), 86 (A010159 ), 87 (A040077 ), 88 (A010160 ), 89 (A010161 ), 90 (A040080 ), 91 (A010162 ), 92 (A010163 ), 93 (A010164 ),
continued fractions for constants: square roots of 94 (A010165 ), 95 (A010166 ), 96 (A010167 ), 97 (A010168 ), 98 (A010169 ), 99 (A010170 ), etc. (square roots of numbers bigger than 100 have been omitted)
continued fractions for constants: Sum_{n>=0} 1/2^(2^n) (A007400 ), Sum_{k>=2} 2^(-Fibonacci(k)) (A006518 ), Sum_{m>=0} 1/(2^2^m - 1) (A048650 )
continued fractions for constants: tan(1) (A009001 ), tan(1/n) n=2 to 10 (A019423 +n)
continued fractions for constants: Trott's (A039663 ), Wallis' number (A058297 ), Wirsing's (A007515 ), prime constant (A051007 ), root of x^5-x-1 (A039922 )
continued fractions for constants: zeta(2) = Pi^2/6 (A013679 ), zeta(3) (A013631 ), zeta(4) (A013680 )
contours: A006021
convenient numbers: A000926
conventions in OEIS: see spelling and notation
convergents (1):: A002363 , A007676 , A002356 , A005663 , A006279 , A002355 , A005664 , A002358 , A002795 , A002353 , A002360 , A007509 , A005484 , A002364
convergents (2):: A007677 , A002351 , A002357 , A002354 , A002794 , A001517 , A002485 , A002352 , A002359 , A002361 , A005668 , A002362 , A002119 , A002486 , A005485
convert from base 10 to base n (or vice versa): A006937 A023372 A023378 A023383 A023387 A023390 A008557 A023392 A010692
convert from decimal to binary: A006937 , A006938
convex lattice polygons: A063984 , A070911 , A089187
Convolution of natural numbers :: A007466
Convolution of triangular numbers :: A007465
Convolutional codes:: A007223 , A007224 , A007225 , A007227 , A007226 , A007228 , A007229
Convolutions:: A007477 , A006013 , A001938 , A000385 , A005798 , A007556
Convolved Fibonacci numbers:: A001629 , A001628 , A001872 , A001873 , A001874 , A001875
Conway group Con.0: A008924
Conway sequences:: A007012 , A004001 , A005940 , A005941 , A003681 , A007542 , A007471 , A003634 , A007547 , A003635
Conway, sequences made famous by: A004001 *, A005150 *
Conway-Guy rapidly growing sequence: A046859
Conway-Guy sequence: A005318 *, A006755 , A005318 , A006754 , A006756 , A006757
coordination sequences: for A_n root lattices: A005901 , A008383 , A008385 , A008387 , A008389 , A008391 , A008393 , A008395 , and A035837 through A035876
coordination sequences: for B_n root lattices: A022144 through A022154 , A107546 through A107571 , and A108000 through A108011
coordination sequences: for C_n root lattices: A010006 , A019560 through A019564 , and A035746 through A035787
coordination sequences: for D_n root lattices: A005901 , A007900 , A008355 , A008357 , A008359 , A008361 , A008376 , A008378 , and A107506 through A107545
coordination sequences: see also crystal ball sequences
coordination sequences: see also under individual lattices
Coprime sequences:: A003139 , A003140 , A002716 , A002715