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A009152 Expansion of e.g.f. cosh(sinh(x))/exp(x). 0
1, -1, 2, -4, 12, -36, 128, -456, 1872, -7888, 37600, -184064, 990784, -5444544, 32333824, -195982208, 1272660224, -8441139456, 59527313920, -428299217920, 3252626013184, -25165446157312, 204354574172160, -1689266143553536 (list; graph; refs; listen; history; text; internal format)
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: A148209 A148210 A148211 * 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

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Last modified July 8 08:08 EDT 2020. Contains 335520 sequences. (Running on oeis4.)