31356

Appears in sequences

• A generalization of triangle A071951 (Legendre-Stirling).at n=18A089504
• Fourth column of triangle A089504.at n=2A089514
• Number of ways to place 2 queens on an n X n chessboard so that they attack each other.at n=26A144945
• Number of 3 X n 0..1 arrays avoiding 0 0 0 and 1 0 1 horizontally and 0 0 1 and 1 0 0 vertically.at n=8A207961
• Union of all unique coefficients of all powers of the g.f. A(x) of this sequence, starting with A(0)=2 and A'(0)=3.at n=74A262975
• Triangle T(n,k) read by rows: coefficients of polynomials P_n(t) defined in Formula section.at n=52A286781
• Column 7 of A286781.at n=2A286792
• Composites k such that the concatenation of the prime factors of k, with multiplicity, in some order is divisible by k.at n=49A322843