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A009771 Expansion of tanh(log(1+sin(x))). 0
0, 1, -1, -1, 10, -29, -46, 1049, -5480, -6299, 367784, -2993101, -433520, 302131831, -3539197936, 4643279549, 477914976640, -7698953963639, 24464869564544, 1282442213912999, -27686771463968000, 150369505621009291 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,5

LINKS

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

MATHEMATICA

Tanh[ Log[ 1+Sin[ x ] ] ]

CROSSREFS

Sequence in context: A102542 A098751 A143190 * A068197 A079273 A271991

Adjacent sequences:  A009768 A009769 A009770 * A009772 A009773 A009774

KEYWORD

sign,easy

AUTHOR

R. H. Hardin

EXTENSIONS

Extended with signs by Olivier Gérard, Mar 15 1997

STATUS

approved

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Last modified July 5 07:32 EDT 2020. Contains 335462 sequences. (Running on oeis4.)