A013141 sin(tanh(x)+arctan(x))=2*x-12/3!*x^3+232/5!*x^5-8960/7!*x^7...

2, -12, 232, -8960, 580480, -57192960, 8028368896, -1530617461760, 381866595811328, -120993556601405440, 47505188434021777408, -22644967739703901421568, 12882783407125570011004928

Offset

0,1

Links

Table of n, a(n) for n=0..12.

Mathematica

With[{nn=30}, Take[CoefficientList[Series[Sin[Tanh[x]+ArcTan[x]], {x, 0, nn}], x] Range[0, nn-1]!, {2, -1, 2}]] (* Harvey P. Dale, May 11 2018 *)

Crossrefs

Sequence in context: A333447 A347597 A009272 * A013143 A009359 A011807

Adjacent sequences: A013138 A013139 A013140 * A013142 A013143 A013144

Keyword

sign

Author

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

Status

approved