A009171 Expansion of cosh(tanh(x)*exp(x)).

1, 0, 1, 6, 17, 20, 97, 1498, 7009, -8952, -44991, 2641870, 16678257, -147810468, -1072851167, 22562632802, 182236444097, -3111217127536, -28067216775039, 608465230881302, 6014702853818321, -136728540813908444

Offset

0,4

Links

Table of n, a(n) for n=0..21.

Mathematica

Cosh[ Tanh[ x ]*Exp[ x ] ]

Crossrefs

Sequence in context: A019296 A035484 A277684 * A012417 A184549 A166025

Adjacent sequences: A009168 A009169 A009170 * A009172 A009173 A009174

Keyword

sign,easy

Author

R. H. Hardin

Extensions

Extended with signs by Olivier Gérard, Mar 15 1997

Status

approved