A209425 Column 2 of triangle A209424.

1, 12, 347, 20429, 1919660, 259227625, 47484618291, 11331926690549, 3416394867284954, 1269892206580345425, 570576180005762038644, 304859737124260849580998, 191049110542296621467314753, 138786261071300963667336947034, 115691448070469092032508527982414

Offset

2,2

Links

Table of n, a(n) for n=2..16.

Prog

 (PARI) {a(n)=polcoeff(polcoeff(exp(sum(m=1, n, x^m/m*sum(k=0, m, binomial(m, k)^m*y^k))+x*O(x^n)), n, x), 2, y)}
for(n=0, 20, print1(a(n), ", "))

Crossrefs

Cf. A209424, A209426.

Sequence in context: A024297 A077296 A080481 * A171206 A219407 A203148

Adjacent sequences: A209422 A209423 A209424 * A209426 A209427 A209428

Keyword

nonn

Author

Paul D. Hanna, Mar 08 2012

Status

approved