OFFSET
0,4
MATHEMATICA
With[{nn=30}, CoefficientList[Series[Log[Cosh[x]+ArcTan[x]], {x, 0, nn}], x]Range[0, nn]!] (* Harvey P. Dale, Mar 12 2013 *)
CROSSREFS
KEYWORD
sign
AUTHOR
Patrick Demichel (patrick.demichel(AT)hp.com)
EXTENSIONS
First term prepended and definition clarified by Harvey P. Dale, Mar 12 2013
STATUS
approved