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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
OFFSET
0,2
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
KEYWORD
nonn
AUTHOR
Patrick Demichel (patrick.demichel(AT)hp.com)
STATUS
approved