36212176000
domain: N
Appears in sequences
- Number of partitions of { 1, 2, ..., 3n } into sets of size 3.at n=7A025035
- Square array read by antidiagonals downwards: T(n,k) = (n*k)!/(k!^n*n!), (n>=1, k>=1), the number of ways of dividing nk labeled items into n unlabeled boxes with k items in each box.at n=42A060540
- a(n) is the number of abelian subgroups of maximal order in S_n.at n=19A265311
- a(n) is the number of abelian subgroups of maximal order in S_n.at n=20A265311
- Triangle read by rows, expansion of e.g.f. exp(x*(exp(z)/3 + 2*exp(-z/2)* cos(z*sqrt(3)/2)/3 - 1)), nonzero coefficients of z.at n=35A291451
- Irregular triangle read by rows in which the n-th row lists multinomials for partitions of 3n which have only parts which are multiples of 3, in Hindenburg order.at n=44A327003