A152038 Convolution of A039599 with itself .

1, 2, 3, 6, 11, 12, 22, 42, 51, 56, 107, 170, 201, 272, 385, 476, 653, 1042, 1433, 1590, 1602, 2386, 4280, 5644, 5508, 6110, 9217, 13324, 17315, 19512, 19690, 25990, 43918, 59982, 61931, 57374

Offset: 0

Author

Philippe Deléham, Nov 20 2008

Keywords

• nonn

Crossrefs

Cf. A039599

Programs

PARI

lista(nn) = {v = vector((nn+1)*(nn+2)/2); iv = 0; for (n=0, nn, for (k=0, n, v[iv++] = (2*k+1)*binomial(2*n, n-k)/(n+k+1););); n = #v; for (i=1, n, print1(sum(k=1, i, v[k]*v[i-k+1]), ", "););} \\ Michel Marcus, Jun 02 2013

Extensions

More terms from Michel Marcus, Jun 02 2013