A209426 Central terms of triangle A209424.

1, 3, 347, 10707908, 72078431500368, 103279205595241909409817, 32276238007289208146779304321387283, 2246642168097747174860193404728752903216792387572, 35410884110668229233891981980646482609768612036854978171150794831

Offset

0,2

Links

Table of n, a(n) for n=0..8.

Prog

 (PARI) {a(n)=polcoeff(polcoeff(exp(sum(m=1, 2*n, x^m/m*sum(k=0, m, binomial(m, k)^m*y^k))+x*O(x^(2*n))), 2*n, x), n, y))}
for(n=0, 10, print1(a(n), ", "))

Crossrefs

Cf. A209424, A209425.

Sequence in context: A234607 A057121 A039515 * A037302 A341229 A157591

Adjacent sequences: A209423 A209424 A209425 * A209427 A209428 A209429

Keyword

nonn

Author

Paul D. Hanna, Mar 08 2012

Status

approved