A009705 - OEIS

%I #16 Jan 27 2014 09:13:00

%S 0,2,4,302,8104,947642,86855404,16203909542,3130092938704,

%T 896924477276402,290713861720990804,121467176505314129822,

%U 58492863120535523766904,33925794100542844193202602

%N E.g.f. tan(tan(x)*sin(x)), even powers only.

%e tan(tan(x)*sin(x)) = 2/2!*x^2+4/4!*x^4+302/6!*x^6+8104/8!*x^8...

%t With[{nn=30},Take[CoefficientList[Series[Tan[Tan[x]Sin[x]],{x,0,nn}], x] Range[0,nn]!,{1,-1,2}]] (* _Harvey P. Dale_, May 09 2012 *)

%K nonn

%O 0,2

%A _R. H. Hardin_

%E Extended and signs tested Mar 15 1997 by _Olivier Gérard_.