OFFSET
0,3
MATHEMATICA
With[{nn=20}, CoefficientList[Series[ArcTan[ArcTanh[x]Exp[x]], {x, 0, nn}], x] Range[0, nn]!] (* Harvey P. Dale, Dec 06 2013 *)
CROSSREFS
KEYWORD
sign
AUTHOR
Patrick Demichel (patrick.demichel(AT)hp.com)
EXTENSIONS
Definition clarified and initial term provided by Harvey P. Dale, Dec 06 2013
STATUS
approved