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 A012562 arctanh(sinh(x)*arctan(x)) = 2/2!*x^2 - 4/4!*x^4 + 350/6!*x^6 - 11240/8!*x^8 + ... 0
 0, 2, -4, 350, -11240, 1703578, -193890860, 49492653366, -12321392081232, 4919573673167538, -2124948350723616724, 1246509899975408733326, -820629733751515166342200, 671843179144303883329974346, -622270861646882104886119580924 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,2 LINKS MATHEMATICA With[{nn=30}, Take[CoefficientList[Series[ArcTanh[Sinh[x]ArcTan[x]], {x, 0, nn}], x]Range[0, nn]!, {1, -1, 2}]] (* Harvey P. Dale, Nov 16 2012 *) CROSSREFS Sequence in context: A012613 A012618 A012557 * A263959 A216024 A247220 Adjacent sequences: A012559 A012560 A012561 * A012563 A012564 A012565 KEYWORD sign AUTHOR Patrick Demichel (patrick.demichel(AT)hp.com) STATUS approved

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Last modified January 31 15:47 EST 2023. Contains 359976 sequences. (Running on oeis4.)