A009520 Expansion of sin(tanh(sin(x))).

1, -4, 68, -2528, 160400, -15384128, 2066458176, -369136141824, 84457146691840, -24053254928131072, 8337440272897836032, -3453890669994608320512, 1684467809557949759983616, -954970518105094229423833088

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