A009666 Expansion of tan(sin(x))*sinh(x).

0, 2, 8, 8, -960, -24416, 174976, 55072384, 2417174528, -157596298752, -36515570849792, -1639992400689152, 545678443552096256, 129227252689536917504, 760653447239073103872, -6729535404906273785610240, -1588610710637517290637099008

Offset

0,2

Links

Table of n, a(n) for n=0..16.

Mathematica

With[{nn=40}, Drop[CoefficientList[Series[Tan[Sin[x]]Sinh[x], {x, 0, nn}], x]Range[0, nn]!, {2, nn, 2}]] (* Harvey P. Dale, Aug 21 2011 *)

Crossrefs

Sequence in context: A202619 A202379 A009181 * A012346 A012649 A009627

Adjacent sequences: A009663 A009664 A009665 * A009667 A009668 A009669

Keyword

sign

Author

R. H. Hardin

Extensions

Extended with signs by Olivier Gérard, Mar 15 1997

More terms from Harvey P. Dale, Aug 21 2011

Status

approved