A108289 Antidiagonal sums of table A060543.

1, 2, 5, 17, 72, 357, 2022, 12900, 91448, 711180, 6004981, 54619489, 531854438, 5515551251, 60642234815, 704106298738, 8603658260904, 110306422692488, 1479905106340895, 20727595895871297, 302423908621734606

Offset

0,2

Links

Table of n, a(n) for n=0..20.

Formula

a(n)=Sum_{k=0..n} C(n+(n-k)*k, (n-k)*k+k)).

Prog

(PARI) a(n)=sum(k=0, n, binomial(n+(n-k)*k, (n-k)*k+k))

Crossrefs

Cf. A108267, A060543, A108288.

Sequence in context: A005967 A369402 A104859 * A007779 A084161 A325294

Adjacent sequences: A108286 A108287 A108288 * A108290 A108291 A108292

Keyword

nonn

Author

Paul D. Hanna, May 31 2005

Status

approved