A009730 Expansion of tan(x)*cos(tanh(x)).

1, -1, 41, -673, 41425, -2148961, 225227705, -23880701185, 3905967813793, -689701934465089, 163751563593866057, -42927084558629732833, 14006383316589639761521, -5072190213708628462141345

Offset

0,3

Links

Table of n, a(n) for n=0..13.

Mathematica

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

Crossrefs

Sequence in context: A197371 A268748 A143010 * A009761 A118448 A298459

Adjacent sequences: A009727 A009728 A009729 * A009731 A009732 A009733

Keyword

sign

Author

R. H. Hardin

Extensions

Extended with signs by Olivier Gérard, Mar 15 1997

Status

approved