A009152 Expansion of e.g.f. cosh(sinh(x))/exp(x).

1, -1, 2, -4, 12, -36, 128, -456, 1872, -7888, 37600, -184064, 990784, -5444544, 32333824, -195982208, 1272660224, -8441139456, 59527313920, -428299217920, 3252626013184, -25165446157312, 204354574172160, -1689266143553536

Offset

0,3

Links

Table of n, a(n) for n=0..23.

Mathematica

Cosh[ Sinh[ x ] ]/Exp[ x ]

Prog

(PARI) my(x='x+O('x^30)); Vec(serlaplace(cosh(sinh(x))/exp(x))) \\ Michel Marcus, Mar 31 2019

Crossrefs

Sequence in context: A148210 A148211 A369688 * A081443 A086647 A268600

Adjacent sequences: A009149 A009150 A009151 * A009153 A009154 A009155

Keyword

sign,easy

Author

R. H. Hardin

Extensions

Extended with signs by Olivier Gérard, Mar 15 1997

Name clarified by Michel Marcus, Mar 31 2019

Status

approved