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A012963
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Expansion of e.g.f.: arctan(arctan(x)+log(x+1))=2*x-1/2!*x^2-16/3!*x^3+42/4!*x^4+756/5!*x^5...
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0
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0, 2, -1, -16, 42, 756, -5130, -82584, 1145256, 15632064, -405336960, -4218834816, 206734828608, 1303793191008, -142600433831856, -162973525708224, 126855035118725760, -683674107835961088
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OFFSET
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0,2
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LINKS
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MATHEMATICA
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With[{nn=20}, CoefficientList[Series[ArcTan[ArcTan[x]+Log[x+1]], {x, 0, nn}], x] Range[0, nn]!] (* Harvey P. Dale, Jan 27 2015 *)
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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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EXTENSIONS
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Definition clarified by and zero prepended by Harvey P. Dale, Jan 27 2015
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STATUS
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approved
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