A091040 Row sums of triangle A091039 (scaled second columns of (k,k)-Stirling2 arrays).

1, 4, 16, 98, 1252, 39056, 3235216, 746947664, 504955938112, 1063702416056576, 7035749505695570176, 160587398553186610959104, 12278492143557175831484111872, 3469220019297527430713345352498176

Offset

1,2

Links

Table of n, a(n) for n=1..14.

Formula

a(n)=sum(A091039(n, k), k=1..n), n>=1.

Crossrefs

Sequence in context: A111976 A236772 A209299 * A029985 A114023 A145823

Adjacent sequences: A091037 A091038 A091039 * A091041 A091042 A091043

Keyword

nonn,easy

Author

Wolfdieter Lang, Jan 23 2004

Status

approved