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A012411
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arctan(arctan(x)*exp(x)) = x + 2/2!*x^2 - 1/3!*x^3 - 28/4!*x^4 - 107/5!*x^5 + ...
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0
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0, 1, 2, -1, -28, -107, 470, 10243, 51592, -677879, -15870422, -76105753, 2647708780, 62662672733, 171362144382, -21259413359701, -489069754224624, 774485831879569, 300884931182492754
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OFFSET
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0,3
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LINKS
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MATHEMATICA
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With[{nn=30}, CoefficientList[Series[ArcTan[ArcTan[x]*Exp[x]], {x, 0, nn}], x] Range[0, nn]!] (* Ray Chandler, Nov 28 2016 *)
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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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