A111552 Row sums of triangle A111544.

1, 2, 8, 46, 338, 2930, 28726, 311342, 3679778, 47000002, 644538614, 9443216366, 147222001954, 2434125748082, 42555399987686, 784634319490894, 15221022251713538, 309977607819594818, 6613678784212854646

Offset

0,2

Links

Table of n, a(n) for n=0..18.

Prog

(PARI) {a(n)=if(n<0, 0, sum(k=1, n+1, (matrix(n+k, n+k, m, j, if(m==j, 1, if(m==j+1, -m+1, -(m-j-1)*polcoeff(log(sum(i=0, m, (i+2)!/2!*x^i)), m-j-1))))^-1)[n+1, k]))}

Crossrefs

Cf. A111544.

Sequence in context: A161881 A219358 A088791 * A321965 A229559 A128085

Adjacent sequences: A111549 A111550 A111551 * A111553 A111554 A111555

Keyword

nonn

Author

Paul D. Hanna, Aug 07 2005

Status

approved