A009814 - OEIS

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A009814

Expansion of tanh(tan(x)*exp(x)).

0

0, 1, 2, 3, -12, -163, -1178, -4529, 27496, 870169, 11481482, 85659387, -308661540, -25105525963, -525814629650, -6328753571321, -1529929548080, 2300980143865777, 71594692481521682, 1258339660640728947

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

OFFSET

0,3

LINKS

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

MATHEMATICA

Tanh[ Tan[ x ]*Exp[ x ] ]

CROSSREFS

Sequence in context: A132501 A067338 A012713 * A362289 A345040 A196378

Adjacent sequences: A009811 A009812 A009813 * A009815 A009816 A009817

KEYWORD

sign,easy

AUTHOR

EXTENSIONS

Extended with signs by Olivier Gérard, Mar 15 1997

STATUS

approved