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A009520 Expansion of sin(tanh(sin(x))). 0
1, -4, 68, -2528, 160400, -15384128, 2066458176, -369136141824, 84457146691840, -24053254928131072, 8337440272897836032, -3453890669994608320512, 1684467809557949759983616, -954970518105094229423833088 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

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

MATHEMATICA

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

CROSSREFS

Sequence in context: A326288 A302115 A009473 * A009791 A012484 A174809

Adjacent sequences:  A009517 A009518 A009519 * A009521 A009522 A009523

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 5 15:22 EST 2021. Contains 341825 sequences. (Running on oeis4.)