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A012729
arcsin(arctanh(x)*arctan(x))=2/2!*x^2+328/6!*x^6+1402272/10!*x^10...
0
2, 328, 1402272, 34476662400, 2862572968849920, 606547177566513039360, 275433333396552433711226880, 237761902453820639998996848476160
OFFSET
0,1
MATHEMATICA
With[{nn=30}, Take[CoefficientList[Series[ArcSin[ArcTanh[x]*ArcTan[x]], {x, 0, nn}], x] Range[0, nn]!, {3, -1, 4}]] (* Ray Chandler, Nov 28 2016 *)
CROSSREFS
Sequence in context: A282430 A012601 A012606 * A173750 A088250 A142355
KEYWORD
nonn
AUTHOR
Patrick Demichel (patrick.demichel(AT)hp.com)
STATUS
approved