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Expansion of e.g.f.: arctan(cosh(x)*log(x+1))=x-1/2!*x^2+3/3!*x^3-57/5!*x^5+405/6!*x^6...
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%I #8 Jan 06 2014 17:08:52

%S 0,1,-1,3,0,-57,405,-1827,-4424,223541,-2901285,19263167,121524216,

%T -6372341445,112206095729,-915357416711,-12418256340720,

%U 674275623382473,-14438518400518281,129951850481453275

%N Expansion of e.g.f.: arctan(cosh(x)*log(x+1))=x-1/2!*x^2+3/3!*x^3-57/5!*x^5+405/6!*x^6...

%t With[{nn=20},CoefficientList[Series[ArcTan[Cosh[x]Log[x+1]],{x,0,nn}],x] Range[0,nn]!] (* _Harvey P. Dale_, Jan 06 2014 *)

%K sign

%O 0,4

%A Patrick Demichel (patrick.demichel(AT)hp.com)

%E Definition clarified and zero prepended by _Harvey P. Dale_, Jan 06 2014