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A013004
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tanh(arctan(x)+tan(x))=2*x-16/3!*x^3+552/5!*x^5-41984/7!*x^7...
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0
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2, -16, 552, -41984, 5530752, -1117490944, 320707001344, -123976597878784, 62093009928880128, -39107324387947577344, 30249801409640561901568, -28190352567614102755082240, 31151946815227412004856659968
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OFFSET
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0,1
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LINKS
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MATHEMATICA
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With[{nn=30}, Take[CoefficientList[Series[Tanh[ArcTan[x]+Tan[x]], {x, 0, nn}], x] Range[0, nn-1]!, {2, -2, 2}]] (* Harvey P. Dale, Jan 28 2013 *)
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CROSSREFS
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KEYWORD
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sign
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AUTHOR
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Patrick Demichel (patrick.demichel(AT)hp.com)
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STATUS
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approved
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