31137

Appears in sequences

• Molien series for certain 16-dimensional group of order 322560 arising from genus-2 weight enumerators of singly-even (but not necessarily self-dual or self-orthogonal) binary codes.at n=21A092351
• a(1) = 1; thereafter a(n) is always the smallest integer > a(n-1) not leading to a contradiction, such that the concatenation of any three consecutive digits in the sequence is a prime.at n=21A152608
• Eight white queens and one red queen on a 3 X 3 chessboard. G.f.: (1+x)/(1-5*x-3*x^2).at n=6A180035
• Number of (n+2) X (1+2) 0..3 arrays with every consecutive three elements in every row and diagonal having exactly two distinct values, and in every column and antidiagonal not having exactly two distinct values, and new values 0 upwards introduced in row major order.at n=17A252712
• Total number of congruence subgroups of PSL(2,Z) of genus n.at n=20A258691
• Numbers n such that n*2^2281 - 1 is prime.at n=30A265504
• Number of multisets of positive integers whose right half (exclusive) sums to n.at n=27A360673