156660
domain: N
Appears in sequences
- Number of partitions of 112233...nn into n pairs.at n=7A108704
- Triangle read by rows: matrix product of the Stirling numbers of the second kind with the binomial coefficients.at n=50A126351
- Expansion of psi(q^2) / f(-q)^2 in powers of q where psi(), f() are Ramanujan theta functions.at n=24A137829
- Triangle read by rows: 2-Stirling numbers of the second kind.at n=49A143494
- Principal diagonal of the convolution array A213828.at n=29A213829
- G.f.: Product_{k>=1, j>=1} (1 + x^(k*j))^2.at n=21A320235