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A009840 Expansion of tanh(x)/cos(sin(x)). 0
1, 1, 1, -167, 289, -30799, 7624865, -327166135, 29995758529, -7060555404191, 991934013190081, -177889548504511175, 51940497621294961121, -14246314907147632709615, 4386830634217402797858657 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,4

LINKS

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

MATHEMATICA

Tanh[ x ]/Cos[ Sin[ x ] ] (* Odd Part *)

CROSSREFS

Sequence in context: A065216 A142485 A046008 * A033255 A052233 A142431

Adjacent sequences:  A009837 A009838 A009839 * A009841 A009842 A009843

KEYWORD

sign

AUTHOR

R. H. Hardin

EXTENSIONS

Extended with signs by Olivier Gérard, Mar 15 1997

STATUS

approved

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Last modified November 16 19:17 EST 2019. Contains 329201 sequences. (Running on oeis4.)