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%I #9 May 03 2013 14:29:58
%S 0,2,-1,20,-54,1188,-7590,181632,-2019080,53249472,-874603440,
%T 25606617472,-562552304160,18326040005024,-504598523011856,
%U 18267771678474112,-603047158364227200,24178616400492978432,-927480579061871147904,40990916944151608195584
%N Arctanh(tan(x)+log(x+1)) = 2*x - 1/2!*x^2 + 20/3!*x^3 - 54/4!*x^4 + 1188/5!*x^5 + ...
%t With[{nn=30},CoefficientList[Series[ArcTanh[Tan[x]+Log[x+1]],{x,0,nn}],x] Range[0,nn]!] (* _Harvey P. Dale_, May 03 2013 *)
%K sign
%O 0,2
%A Patrick Demichel (patrick.demichel(AT)hp.com)
%E More terms from _Harvey P. Dale_, May 03 2013
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