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A013313
arctan(exp(x)-cos(x))=x+2/2!*x^2-1/3!*x^3-24/4!*x^4-115/5!*x^5...
0
1, 2, -1, -24, -115, 242, 9179, 65296, -366535, -14288158, -124059241, 1440362616, 57563571845, 541440703442, -11649746422861, -473630058916064, -4395343414984975, 168230486159471042
OFFSET
1,2
MATHEMATICA
With[{nn=20}, Rest[CoefficientList[Series[ArcTan[Exp[x]-Cos[x]], {x, 0, nn}], x] Range[0, nn]!]] (* Harvey P. Dale, Jan 01 2015 *)
CROSSREFS
Sequence in context: A297892 A101179 A184295 * A013317 A010256 A087452
KEYWORD
sign
AUTHOR
Patrick Demichel (patrick.demichel(AT)hp.com)
STATUS
approved