A111555 Column 2 of triangle A111553.

1, 3, 16, 116, 1016, 10176, 113216, 1375456, 18047296, 253815936, 3805221376, 60558070016, 1019617312256, 18111737604096, 338602832961536, 6648048064792576, 136810876329865216, 2945671077411987456

Offset

0,2

Links

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

Prog

(PARI) {a(n)=if(n<0, 0, (matrix(n+3, n+3, m, j, if(m==j, 1, if(m==j+1, -m+1, -(m-j-1)*polcoeff(log(sum(i=0, m, (i+3)!/3!*x^i)), m-j-1))))^-1)[n+3, 3])}

Crossrefs

Cf. A111553, A111531.

Sequence in context: A036244 A011818 A036248 * A336293 A355718 A221409

Adjacent sequences: A111552 A111553 A111554 * A111556 A111557 A111558

Keyword

nonn

Author

Paul D. Hanna, Aug 07 2005

Status

approved