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A009678 Expansion of tan(sinh(tan(x))). 0
1, 5, 113, 5725, 509729, 70109269, 13747568721, 3638247408429, 1248754592688193, 539284011302978597, 286116175138397606705, 182918545555610954788989, 138683263058208603513689441 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..12.

MATHEMATICA

Tan[ Sinh[ Tan[ x ] ] ] (* Odd Part *)

CROSSREFS

Sequence in context: A279836 A279838 A009603 * A009691 A194570 A210908

Adjacent sequences:  A009675 A009676 A009677 * A009679 A009680 A009681

KEYWORD

nonn

AUTHOR

R. H. Hardin

EXTENSIONS

Extended and signs tested Mar 15 1997 by Olivier Gérard.

STATUS

approved

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Last modified December 12 20:12 EST 2019. Contains 329961 sequences. (Running on oeis4.)