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A013173 arctan(arctanh(x)+tan(x))=2*x-12/3!*x^3+488/5!*x^5-48608/7!*x^7... 0

%I #6 Nov 29 2016 08:40:24

%S 2,-12,488,-48608,9080960,-2722798848,1197871592448,-726520846829568,

%T 581088281306562560,-592572418222512668672,750419972539476482195456,

%U -1155381150026866713259671552,2125413346746653166067846742016

%N arctan(arctanh(x)+tan(x))=2*x-12/3!*x^3+488/5!*x^5-48608/7!*x^7...

%t With[{nn=30},Take[CoefficientList[Series[ArcTan[ArcTanh[x]+Tan[x]],{x,0,nn}],x] Range[0,nn-1]!,{2,-1,2}]] (* _Ray Chandler_, Nov 29 2016 *)

%K sign

%O 0,1

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

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Last modified February 28 18:11 EST 2024. Contains 370400 sequences. (Running on oeis4.)