A009826 Expansion of tanh(x)*cos(tan(x)).

1, -5, 1, -797, 1345, -785685, 33807489, -492925869, 846642059905, 79077949115227, 36210294463841281, 6194961651235041859, 2607668614681912579521, 628125063344376763784011, 293462485767782617143864449

Offset

0,2

Links

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

Mathematica

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

Crossrefs

Sequence in context: A162227 A075266 A094096 * A255855 A255858 A238798

Adjacent sequences: A009823 A009824 A009825 * A009827 A009828 A009829

Keyword

sign

Author

R. H. Hardin

Extensions

Extended with signs by Olivier Gérard, Mar 15 1997

Status

approved