A259901 n*a(n+1) = (2*n^2+3*n+2)*a(n)-(n^2-n-2)*a(n-1); a(0)=1, a(1)=0.

1, 0, 2, 16, 152, 1708, 22340, 334576, 5655728, 106614376, 2218604984, 50533429120, 1250740957088, 33431017185424, 959826261991088, 29461904795338432, 962861521385936960, 33382265104850376544, 1223778627669787330592, 47299552515980875903744

Offset

0,3

Links

Table of n, a(n) for n=0..19.

Formula

a(n) ~ exp(1/4) * 2^(n+4) * n! * n^(1/4) / (15*Gamma(1/4)). - Vaclav Kotesovec, Jul 09 2015

Mathematica

RecurrenceTable[{a[0]==1, a[1]==0, (n)*a[n+1]== (2n^2 +3*n+2)*a[n] - (n+1)*(n-2)*a[n-1]}, a, {n, 30}]

Crossrefs

Sequence in context: A085510 A290785 A209391 * A209021 A209056 A209213

Adjacent sequences: A259898 A259899 A259900 * A259902 A259903 A259904

Keyword

nonn,easy

Author

G. C. Greubel, Jul 07 2015

Status

approved