OFFSET
0,4
MATHEMATICA
With[{nn=30}, CoefficientList[Series[Log[1+ Tanh[ Tanh[x]]], {x, 0, nn}], x] Range[0, nn]!] (* Harvey P. Dale, Aug 08 2012 *)
CROSSREFS
KEYWORD
sign,easy
AUTHOR
EXTENSIONS
Extended with signs by Olivier Gérard, Mar 15 1997
STATUS
approved