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A012630 arctanh(arcsinh(x)*arctan(x))=2/2!*x^2-12/4!*x^4+478/6!*x^6-30072/8!*x^8... 0
2, -12, 478, -30072, 3540762, -612942660, 152039588790, -50468748044400, 21718174357721010, -11738352932289531900, 7790876172172937111310, -6228079669260433576829160, 5903220687917269513392843210 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,1
LINKS
MATHEMATICA
With[{nn=30}, Take[CoefficientList[Series[ArcTanh[ArcSinh[x]ArcTan[x]], {x, 0, nn}], x] Range[0, nn]!, {3, -1, 2}]] (* Harvey P. Dale, Aug 02 2015 *)
CROSSREFS
Sequence in context: A091471 A357895 A012625 * A013173 A013147 A250110
KEYWORD
sign
AUTHOR
Patrick Demichel (patrick.demichel(AT)hp.com)
EXTENSIONS
Definition clarified by Harvey P. Dale, Aug 02 2015
STATUS
approved

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Last modified February 25 16:57 EST 2024. Contains 370332 sequences. (Running on oeis4.)