a(a(n)) = 2n and similar sequences, (start):
a(a(n)) = 2n and similar sequences: (1) A000027 A002516 A002517 A002518 A003605 A007378 A007379 A054786 A054787 A054788 A054789 A054790
a(a(n)) = 2n and similar sequences: (2) A079000 A079253 A079905 A080588 A080589 A080591 A080596 A080637
a(a(n)) = 2n and similar sequences: see also: (1) A000201 A001462 A007479 A038752 A038755 A038756 A038757 A054048 A054049 A054791 A054792 A054793
a(a(n)) = 2n and similar sequences: see also: (2) A065804
a(n+1)=a(n)^2 + ..., recurrences of the form (start):
a(n+1)=a(n)^2 + ..., recurrences of the form, (1) A000058 A000289 A000324 A001042 A001056 A001146 A001510 A001543 A001566 A001696 A001699 A001999
a(n+1)=a(n)^2 + ..., recurrences of the form, (2) A002065 A003010 A003095 A003096 A004019 A028300 A051179
a(n+1)=a(n)^2 + ..., recurrences of the form, (3) A000215 A000283 A007018 A058181 A058182 A098152 A117805 A126023
A(n, d), maximal size of binary code of length n and minimal distance d, sequences related to (start):
A(n,3), maximal size of binary code of length n and minimal distance 3: A005864 *
A(n,4), maximal size of binary code of length n and minimal distance 4: A005864 *
A(n,5), maximal size of binary code of length n and minimal distance 5: A005865 *
A(n,6), maximal size of binary code of length n and minimal distance 6: A005865 *
A(n,7), maximal size of binary code of length n and minimal distance 7: A005866 *
A(n,8), maximal size of binary code of length n and minimal distance 8: A005866 *
A(n,d,w) , maximal size of binary code of length n, constant weight w and minimal distance d, sequences related to (start):
A(n,d,w) sequences (1): A001839 A001843 A004035 A004036 A004037 A004038 A004039 A004043 A004047 A004052 A004056 A004067
A(n,d,w) sequences (2): A005851 A005852 A005853 A005854 A005855 A005856 A005857 A005858 A005859 A005860 A005861 A005862
A(n,d,w) sequences (3): A005863
a/b + b/c + c/a = n: A072716
A2 lattice, (also known as hexagonal or triangular lattice) sequences related to (start):
A2 lattice, coordination sequence for: A008458 *
A2 lattice, crystal ball sequence for: A003215 *
A2 lattice, numbers represented by: A003136 *
A2 lattice, polygons on: A036418 *
A2 lattice, sublattices of: A003051 *, A003050 *, A054384 *
A2 lattice, theta series of: A004016 *, A035019 *
A2 lattice, theta series of: see also A005881 , A005882 , A014202
A2 lattice, walks on: A001334 *
A3 lattice: see f.c.c. lattice
A3* lattice: see b.c.c. lattice
A4 lattice, sequences related to (start):
A4 lattice, coordination sequence for: A008383 *
A4 lattice, crystal ball sequence for: A008384 *
A4 lattice, theta sequence for: A008444 *