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A009730 Expansion of tan(x)*cos(tanh(x)). 0
1, -1, 41, -673, 41425, -2148961, 225227705, -23880701185, 3905967813793, -689701934465089, 163751563593866057, -42927084558629732833, 14006383316589639761521, -5072190213708628462141345 (list; graph; refs; listen; history; text; internal format)
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

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Last modified March 19 13:37 EDT 2019. Contains 321330 sequences. (Running on oeis4.)