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%I #6 May 24 2013 16:09:26
%S 1,12,1792,889152,1045556992,2424156352512,9849171061952512,
%T 64566114865428283392,642433596401162586161152,
%U 9255521545388420536885051392,185972570219438391836588939149312,5054977199391984218529977072942579712
%N cosh(cos(x)-cosh(x))=1+12/4!*x^4+1792/8!*x^8+889152/12!*x^12...
%t With[{nn=40},Take[CoefficientList[Series[Cosh[Cos[x]-Cosh[x]],{x,0,nn}],x] Range[0,nn]!,{1,-1,4}]] (* _Harvey P. Dale_, May 24 2013 *)
%K nonn
%O 0,2
%A Patrick Demichel (patrick.demichel(AT)hp.com)
%E More terms from _Harvey P. Dale_, May 24 2013