A009715 Expansion of tan(tanh(x))*cos(x).

1, -3, -3, 273, -5159, -62139, 16414101, -1357293927, 59192332081, 5204089208589, -1943937262679379, 331586038355507361, -32236263434125968887, -1484274347735103183531, 1139055571050751311941445

Offset

0,2

Links

Table of n, a(n) for n=0..14.

Mathematica

Tan[ Tanh[ x ] ]*Cos[ x ] (* Odd Part *)

Crossrefs

Sequence in context: A113457 A113466 A007301 * A344283 A335258 A292163

Adjacent sequences: A009712 A009713 A009714 * A009716 A009717 A009718

Keyword

sign

Author

R. H. Hardin

Extensions

Extended with signs by Olivier Gérard, Mar 15 1997

Status

approved