OFFSET
0,4
MATHEMATICA
With[{nn=20}, CoefficientList[Series[ArcTan[Sec[x]Log[x+1]], {x, 0, nn}], x] Range[0, nn]!] (* Harvey P. Dale, Dec 10 2013 *)
CROSSREFS
KEYWORD
sign
AUTHOR
Patrick Demichel (patrick.demichel(AT)hp.com)
EXTENSIONS
a(0) prepended and definition clarified by Harvey P. Dale, Dec 10 2013
STATUS
approved