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

Author

Paul D. Hanna, May 31 2005

Keywords

• nonn

Crossrefs

Cf. A108267, A060543, A108288.

Programs

PARI

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

Formula

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