A013134 sin(tanh(x)+tan(x))=2*x-8/3!*x^3+64/5!*x^5-2816/7!*x^7+80896/9!*x^9...

2, -8, 64, -2816, 80896, -7278592, 532070400, -71008190464, 10323887915008, -1895043049717760, 458133970106712064, -113313946829854867456, 40093022675430493126656, -13211730725723035930722304

Offset

0,1

Links

Table of n, a(n) for n=0..13.

Mathematica

With[{nn=30}, Take[CoefficientList[Series[Sin[Tanh[x]+Tan[x]], {x, 0, nn}], x] Range[0, nn-1]!, {2, -1, 2}]] (* Harvey P. Dale, Nov 25 2015 *)

Crossrefs

Sequence in context: A073113 A361007 A091794 * A009602 A248028 A011836

Adjacent sequences: A013131 A013132 A013133 * A013135 A013136 A013137

Keyword

sign

Author

Patrick Demichel (patrick.demichel(AT)hp.com)

Status

approved