A118790 Secondary diagonal of triangle A118788.

1, 3, 23, 255, 3679, 65247, 1371887, 33347535, 919848991, 28382683263, 968565339983, 36217270235055, 1472548026160639, 64679673007670367, 3052084360057720367, 153980839859926277775, 8270901171633696369631

Offset

0,2

Links

Table of n, a(n) for n=0..16.

Formula

a(n) = (n+1)!*[x^n] ( x/(2*x + log(1-x)) )^(n+2).

Prog

(PARI)
{a(n)=local(x=X+X^2*O(X^(n))); (n+1)!*polcoeff((x/(2*x+log(1-x)))^(n+2), n, X)}

Crossrefs

Cf. A118788, A118789.

Sequence in context: A199750 A318004 A098681 * A159017 A004700 A199544

Adjacent sequences: A118787 A118788 A118789 * A118791 A118792 A118793

Keyword

nonn

Author

Paul D. Hanna, Apr 29 2006

Status

approved