A102317 Row sums of triangle A102316.

1, 2, 7, 40, 333, 3706, 52128, 891700, 18038217, 422455778, 11265993155, 337573337108, 11241696796572, 412291622024088, 16524941775629068, 719072894898300540, 33777207106037303457, 1704222469853179505170

Offset

0,2

Links

Table of n, a(n) for n=0..17.

Prog

(PARI) {a(n)=local(M=matrix(n+1, n+1)); for(m=0, n, for(k=0, m, M[m+1, k+1]=if(m==0|k==0, 1, M[m+1, k]+(k+1)*M[m, k+1]))); return(sum(i=0, n, M[n+1, i+1]))}

Crossrefs

Cf. A102316.

Sequence in context: A105625 A367255 A135082 * A361828 A031973 A274279

Adjacent sequences: A102314 A102315 A102316 * A102318 A102319 A102320

Keyword

nonn

Author

Paul D. Hanna, Jan 04 2005

Status

approved