A009151 - OEIS

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A009151

Expansion of cosh(sinh(log(1+x))).

1, 0, 1, -3, 16, -100, 736, -6216, 59284, -630288, 7391836, -94796020, 1319653336, -19816887168, 319274039176, -5492805409560, 100490908021456, -1947909828835456, 39875223857927824, -859529863811898288

(list; graph; refs; listen; history; text; internal format)

OFFSET

0,4

LINKS

Table of n, a(n) for n=0..19.

MATHEMATICA

Cosh[ Sinh[ Log[ 1+x ] ] ]

CROSSREFS

Sequence in context: A091641 A137572 A369620 * A009007 A000949 A091637

Adjacent sequences: A009148 A009149 A009150 * A009152 A009153 A009154

KEYWORD

sign,easy

AUTHOR

R. H. Hardin

EXTENSIONS

Extended with signs by Olivier Gérard, Mar 15 1997

STATUS

approved