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A012242
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log(cos(tanh(x)))=-1/2!*x^2+6/4!*x^4-72/6!*x^6+1456/8!*x^8...
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0
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-1, 6, -72, 1456, -47104, 2390784, -180612096, 18625189888, -2431403622400, 384624656646144, -72343735465672704, 16067422146130345984, -4193787904779561730048, 1276366494840535652499456
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graph;
refs;
listen;
history;
text;
internal format)
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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=30}, Take[CoefficientList[Series[Log[Cos[Tanh[x]]], {x, 0, nn}], x] Range[0, nn]!, {3, -1, 2}]] (* Harvey P. Dale, May 27 2014 *)
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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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