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A012176 arcsin(tan(arctanh(x)))=x+5/3!*x^3+129/5!*x^5+7965/7!*x^7+910785/9!*x^9... 0
1, 5, 129, 7965, 910785, 168520725, 46302986625, 17780913886125, 9118678334858625, 6027946461936745125, 4993688347647511370625, 5067155718588449670088125, 6180682927872411162068450625 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

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

MATHEMATICA

With[{nn=30}, Take[CoefficientList[Series[ArcSin[Tan[ArcTanh[x]]], {x, 0, nn}], x] Range[0, nn-1]!, {2, -1, 2}]] (* Harvey P. Dale, Nov 03 2011 *)

CROSSREFS

Sequence in context: A012218 A012136 A012022 * A012187 A012083 A012226

Adjacent sequences:  A012173 A012174 A012175 * A012177 A012178 A012179

KEYWORD

nonn

AUTHOR

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

STATUS

approved

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Last modified October 20 21:30 EDT 2019. Contains 328273 sequences. (Running on oeis4.)