OFFSET
0,5
MATHEMATICA
With[{nn=30}, CoefficientList[Series[Sech[Log[x+1]-Tanh[x]], {x, 0, nn}], x] Range[0, nn]!] (* Harvey P. Dale, Dec 01 2013 *)
CROSSREFS
KEYWORD
sign
AUTHOR
Patrick Demichel (patrick.demichel(AT)hp.com)
EXTENSIONS
Definition clarified by Harvey P. Dale, Dec 01 2013
STATUS
approved