A121277 Row sums of triangle A062993.

1, 2, 4, 10, 32, 126, 588, 3171, 19382, 132099, 990756, 8093603, 71436060, 676734190, 6842383982, 73483900031, 834766518890, 9994386677811, 125715770020804, 1656716763283342, 22816308485104494, 327646842078735037, 4896100535018809108, 75994281001001114847

Offset

0,2

Links

Alois P. Heinz, Table of n, a(n) for n = 0..200

Formula

a(n) = Sum_{k=0..n} A062993(n,k).

Maple

b:= (n, k)-> binomial((k+2)*(n-k), n-k) /((k+1) *(n-k)+1):
a:= n-> add (b(n, k), k=0..n):
seq (a(n), n=0..25);  # Alois P. Heinz, Apr 07 2011

Crossrefs

Sequence in context: A001250 A013032 A098830 * A009284 A105557 A166741

Adjacent sequences: A121274 A121275 A121276 * A121278 A121279 A121280

Keyword

nonn

Author

Philippe Deléham, Aug 23 2006

Extensions

More terms from Alois P. Heinz, Apr 07 2011

Status

approved