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cos(sinh(x)+tan(x))=1-4/2!*x^2-8/4!*x^4+122/6!*x^6+5352/8!*x^8...
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%I #6 Jan 12 2017 12:27:48

%S 1,-4,-8,122,5352,239494,14203028,1067540778,94081990576,

%T 8737926966734,612930093492268,-75242844404703342,

%U -70546032648374158392,-35348193779396075142282,-16607148139155135705120508,-8041224802288813510222074374,-4132501715459889292923513686176

%N cos(sinh(x)+tan(x))=1-4/2!*x^2-8/4!*x^4+122/6!*x^6+5352/8!*x^8...

%t With[{nn=40},Take[CoefficientList[Series[Cos[Sinh[x]+Tan[x]],{x,0,nn}],x] Range[0,nn]!,{1,-1,2}]] (* _Harvey P. Dale_, Jan 12 2017 *)

%K sign

%O 0,2

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

%E More terms from _Harvey P. Dale_, Jan 12 2017