A152038 - OEIS

%I #6 Sep 08 2013 13:31:30

%S 1,2,3,6,11,12,22,42,51,56,107,170,201,272,385,476,653,1042,1433,1590,

%T 1602,2386,4280,5644,5508,6110,9217,13324,17315,19512,19690,25990,

%U 43918,59982,61931,57374

%N Convolution of A039599 with itself .

%o (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

%Y Cf. A039599

%K nonn

%O 0,2

%A _Philippe Deléham_, Nov 20 2008

%E More terms from _Michel Marcus_, Jun 02 2013