OFFSET
0,3
MATHEMATICA
With[{nn=30}, CoefficientList[Series[ArcTan[ArcTan[x]*Exp[x]], {x, 0, nn}], x] Range[0, nn]!] (* Ray Chandler, Nov 28 2016 *)
CROSSREFS
KEYWORD
sign
AUTHOR
Patrick Demichel (patrick.demichel(AT)hp.com)
STATUS
approved