C(n,2): A000217 *
C(n,3): A000292 *
C(n,4): A000332 *
C(n,k): binomial coefficient n-choose-k (see A007318 )
cacti , sequences related to (start):
cacti, 2-ary: A054357 *, A054358
cacti, 3-ary: A052393 *, A054422
cacti, 4-ary: A052394 *, A052395
cacti, 5-ary: A054363 *, A054364
cacti, 6-ary: A054366 *, A054367
cacti, 7-ary: A054369 *, A054370
cacti, plane, 3-gonal: A054423
cacti, plane, 4-gonal: A054362
cacti, plane, 5-gonal: A054365
cacti, plane, 6-gonal: A054368
cacti, plane, 7-gonal: A054371
cacti, polygonal: A035082 *, A035088 *
cacti, rooted, polygonal: A035085 *, A035086 , A035087 *
cacti, rooted, triangular: A002067 , A003080 *, A032035 , A034940 *, A091481 , A091486 , A091488
cacti, rooted, with bridges: A000237 *, A035351 *, A035352 , A035353 , A035357
cacti, triangular: A003081 *, A034941 *, A091485 , A091487 , A091489
cacti, with bridges: A000083 * (unlabeled), A000314 * (labeled), A035356
cage graphs: A052453 , A052454
Cahen's constant: A006279 , A006280 , A006281
cake numbers: A000125 *
calculator display: A006942 * A010371 * A018846 A018847 A018849 A038136 A053701 A063720
Cald's sequence: A006509 *
calendar, sequences related to (start):
calendar, dates of days in: A008684 *
calendar, days in year: A011763 *
calendar, days per century: A011770 , A011771
calendar, lengths of months: A008685 *
calendar: see also A001356 , A031139 , A051121
campanology: see bell ringing
canalizing Boolean functions: A102449 , A109460 , A109461 , A109462
cannonball problem: see A001032
Cantor set: A005823
Cantor's sigma function: A055068
card arranging: A006063
card arranging: see also sorting
card games: see also poker
card games: see also patience
card matching, sequences related to (start):
card matching: (1) A000279 A000316 A000459 A000489 A000535 A059056 A059057 A059058 A059059 A059060 A059061 A059062
card matching: (2) A059063 A059064 A059065 A059066 A059067 A059068 A059069 A059070 A059071 A059072 A059073 A059074
card sorting: see sorting
Carmichael numbers , (start):
Carmichael numbers: A002997 *
Carmichael numbers: see also (1) A002322 A006931 A006972 A029553 A029554 A029555 A029556 A029557 A029558 A029559 A029560 A029561
Carmichael numbers: see also (2) A029562 A029563 A029564 A029565 A029566 A029567 A029568 A029569 A029570 A029590 A029591 A033502
Carmichael numbers: see also (3) A034380 A036060 A036429 A046025 A051663
Carmichael numbers: see also pseudoprimes
Carmichael's lambda function: A002322 *, A011773
cascades of gates: A005608 A005609 A005610 A005611 A005613 A005616 A005618 A005619 A005739 A005749
caskets: A006901
Catalan constant: A006752 , A014538
Catalan numbers : A000108 *
Catalan numbers, 3-dimensional: A005789 *
Catalan numbers, generalized: (1) A001003 A004148 A004149 A006629 A006630 A006631 A006632 A006633 A006634 A006635 A006636 A006637
Catalan numbers, generalized: (2) A023421 A023422 A023423 A023425 A023426 A023427 A023428 A023429 A023430 A023431 A023432 A023433
Catalan numbers, generalized: (3) A025242 A025748 A025749 A025750 A025751 A025752 A025753 A025754 A025755 A025756 A025757 A025758
Catalan numbers, generalized: (4) A025759 A025760 A025761 A025762 A025763 A053991
Catalan numbers: see also (1) A005807 , A007317 , A000957 , A005568 , A003046 , A003047 , A007595 , A003150 , A002996 , A001453
Catalan numbers: see also (2) A051785
Catalan triangle: A009766 , A008315 , A028364 , see also A002057 .
Catalan triangle: Adamson's generalization: A116925
Catalan's conjecture: A002760 *, A023057 , A023055 , A001597
Catalan: A051785
Cauchy numbers: A006232 /A006233 , A002657 /A002790
Cayley's mistake: A000022 *