A009204 Expansion of e.g.f. exp(sin(tanh(x))).

1, 1, 1, -2, -11, 8, 253, 344, -9463, -44416, 491609, 5130368, -30257347, -688030080, 1480493589, 109875416832, 177416283793, -20650894622720, -125705754161615, 4460981432725504, 53738108098148101, -1069938200055119872

Offset

0,4

Links

Vincenzo Librandi, Table of n, a(n) for n = 0..200

Mathematica

With[{nn=30}, CoefficientList[Series[Exp[Sin[Tanh[x]]], {x, 0, nn}], x] Range[0, nn]!] (* Harvey P. Dale, Jun 16 2013 *)

Crossrefs

Sequence in context: A375881 A277055 A009258 * A023642 A025536 A378000

Adjacent sequences: A009201 A009202 A009203 * A009205 A009206 A009207

Keyword

sign,easy

Author

R. H. Hardin

Extensions

Extended with signs by Olivier Gérard, Mar 15 1997

Definition clarified and Mathematica program replaced by Harvey P. Dale, Jun 16 2013

Status

approved