A009790 Expansion of tanh(sin(log(1+x))).

0, 1, -1, -1, 12, -44, 0, 1308, -9744, 10252, 627300, -8602012, 52192272, 175312944, -7344669696, 47605119248, 1147983841920, -39804749006384, 654853807745712, -6275619074963280, 23531625959609280, -369751741237644224

Offset

0,5

Links

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

Mathematica

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

Crossrefs

Sequence in context: A136279 A012471 A116187 * A009519 A106808 A296181

Adjacent sequences: A009787 A009788 A009789 * A009791 A009792 A009793

Keyword

sign,easy

Author

R. H. Hardin

Extensions

Extended with signs by Olivier Gérard, Mar 15 1997

Status

approved