A009678 Expansion of tan(sinh(tan(x))).

1, 5, 113, 5725, 509729, 70109269, 13747568721, 3638247408429, 1248754592688193, 539284011302978597, 286116175138397606705, 182918545555610954788989, 138683263058208603513689441

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