A246387 Row sums of triangular matrix defined by exp(L) where L(n,k) = C(2*n, 2*k+1) for n>=0, k=0..n.

1, 3, 13, 85, 745, 8409, 117613, 1982629, 39464401, 912190449, 24152719957, 724395387805, 24377798538361, 913045021983273, 37793566032030013, 1718326694466838165, 85350122951385331105, 4609179886250736447969, 269460743294547701329573, 16987827203251213328307469

Offset

0,2

Links

Table of n, a(n) for n=0..19.

Prog

(PARI) {a(n)=local(L=matrix(n+1, n+1, r, c, if(r>=c, binomial(2*r-2, 2*c-1))), A);
A=sum(m=0, n, L^m/m!); sum(k=0, n, A[n+1, k+1])}
for(n=0, 25, print1(a(n), ", "))

Crossrefs

Cf. A246381, A246385, A246386.

Sequence in context: A125500 A121679 A349582 * A023037 A354436 A157451

Adjacent sequences: A246384 A246385 A246386 * A246388 A246389 A246390

Keyword

nonn

Author

Paul D. Hanna, Aug 24 2014

Status

approved