A009610 - OEIS

A009610

sinh(sinh(x)*tan(x)) = 2/2!*x^2 + 12/4!*x^4 + 262/6!*x^6 + 13272/8!*x^8 + ...

0, 2, 12, 262, 13272, 957962, 92373732, 11700940942, 1898239676592, 383856666320402, 94495162415525052, 27775889989675653142, 9596246875502670987912, 3846428998586880438721562, 1769213328996568414223239572, 925116125161545668585359733662

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OFFSET

0,2

LINKS

Table of n, a(n) for n=0..15.

MATHEMATICA

With[{nn=30}, Take[CoefficientList[Series[Sinh[Tan[x]*Sinh[x]], {x, 0, nn}], x] Range[0, nn]!, {1, -1, 2}]] (* Harvey P. Dale, Feb 21 2013 *)

CROSSREFS

Sequence in context: A320212 A361749 A012549 * A012546 A193204 A289314

Adjacent sequences: A009607 A009608 A009609 * A009611 A009612 A009613

KEYWORD

nonn

AUTHOR

R. H. Hardin

EXTENSIONS

Extended and signs tested Mar 15 1997 by Olivier Gérard.

More terms from Harvey P. Dale, Feb 21 2013

STATUS

approved