A113333 Column sums of triangle A113129.

1, 1, 3, 20, 217, 3206, 59000, 1288184, 32391811, 919625298, 29062669744, 1011423361344, 38432306102230, 1583371370586372, 70311532983998416, 3348279599587251984, 170232740676793931347, 9204327574128495048866

Offset: 0

Author

Paul D. Hanna, Nov 03 2005

Keywords

• nonn

Crossrefs

Cf. A113129.

Formula

a(k) = Sum_{n=k..2*k} A113129(n, k) for k>=0, where A113129(n, k)=0 for n>=2*k>0.