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A012002
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arctan(log(cos(x)))=-1/2!*x^2-2/4!*x^4+14/6!*x^6+568/8!*x^8...
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0
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0, -1, -2, 14, 568, 2144, -1061312, -65851696, 3745115008, 1232648783744, 50799435228928, -36670923310299136, -8828746813705828352, 954888000296009790464, 1122466427244127979911168
(list;
graph;
refs;
listen;
history;
text;
internal format)
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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}, Take[CoefficientList[Series[ArcTan[Log[Cos[x]]], {x, 0, nn}], x] Range[0, nn]!, {1, -1, 2}]] (* Harvey P. Dale, Aug 10 2019 *)
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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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Added missing 0 at start, otherwise this is OK. - N. J. A. Sloane, Dec 17 2011
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STATUS
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approved
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