OFFSET
2,2
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 2..200
MATHEMATICA
With[{nn=30}, Drop[CoefficientList[Series[ArcTan[Log[x+1]-Tanh[x]], {x, 0, nn}], x] Range[0, nn]!, 2]] Harvey P. Dale, May 17 2012
CROSSREFS
KEYWORD
sign
AUTHOR
Patrick Demichel (patrick.demichel(AT)hp.com)
EXTENSIONS
Definition clarified by Harvey P. Dale, May 17 2012
STATUS
approved