A013134 - OEIS

%I #6 Nov 25 2015 10:01:21

%S 2,-8,64,-2816,80896,-7278592,532070400,-71008190464,10323887915008,

%T -1895043049717760,458133970106712064,-113313946829854867456,

%U 40093022675430493126656,-13211730725723035930722304

%N sin(tanh(x)+tan(x))=2*x-8/3!*x^3+64/5!*x^5-2816/7!*x^7+80896/9!*x^9...

%t With[{nn=30},Take[CoefficientList[Series[Sin[Tanh[x]+Tan[x]],{x,0,nn}], x] Range[0,nn-1]!,{2,-1,2}]] (* _Harvey P. Dale_, Nov 25 2015 *)

%K sign

%O 0,1

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