OFFSET
0,3
MATHEMATICA
With[{nn=30}, Take[CoefficientList[Series[Log[1+Tanh[x]*x]/2, {x, 0, nn}], x] Range[0, nn]!, {1, -1, 2}]] (* Harvey P. Dale, Mar 04 2013 *)
CROSSREFS
KEYWORD
sign
AUTHOR
EXTENSIONS
Extended with signs Mar 1997
STATUS
approved