A009693 Expansion of tan(tan(tanh(x))).

1, 2, 8, 48, -256, -6656, 930816, -94216192, 9099706368, -822565076992, 27885670498304, 20948024601608192, -10620485000782413824, 3800373452911396519936, -1166459964091299721641984

Offset

0,2

Links

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

Mathematica

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

Crossrefs

Sequence in context: A292277 A173841 A004141 * A192251 A104190 A152661

Adjacent sequences: A009690 A009691 A009692 * A009694 A009695 A009696

Keyword

sign

Author

R. H. Hardin

Extensions

Extended with signs by Olivier Gérard, Mar 15 1997

Status

approved