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

Author

Philippe Deléham, Aug 23 2006

Keywords

• nonn

Links

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

Programs

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

Formula

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

Extensions

More terms from Alois P. Heinz, Apr 07 2011