OFFSET
0,2
MATHEMATICA
With[{nn=40}, Take[CoefficientList[Series[Sec[ArcTanh[x]ArcTan[x]], {x, 0, nn}], x] Range[0, nn]!, {1, -1, 4}]] (* Harvey P. Dale, Aug 17 2016 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
Patrick Demichel (patrick.demichel(AT)hp.com)
EXTENSIONS
Definition clarified by Harvey P. Dale, Aug 17 2016
STATUS
approved