A009771 Expansion of tanh(log(1+sin(x))).

0, 1, -1, -1, 10, -29, -46, 1049, -5480, -6299, 367784, -2993101, -433520, 302131831, -3539197936, 4643279549, 477914976640, -7698953963639, 24464869564544, 1282442213912999, -27686771463968000, 150369505621009291

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