A009521 Expansion of sin(tanh(tan(x))).

1, -1, -7, 55, 2897, -5105, -7252983, -341550201, 43255573537, 11238852308639, 963068748879257, -153386988236833449, -82902651997417876879, -17679532127297031010385, -779530123182446522616663

Offset

0,3

Links

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

Mathematica

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

Crossrefs

Sequence in context: A055056 A305282 A197228 * A116120 A056719 A038855

Adjacent sequences: A009518 A009519 A009520 * A009522 A009523 A009524

Keyword

sign

Author

R. H. Hardin

Extensions

Extended with signs by Olivier Gérard, Mar 15 1997

Status

approved