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%I #21 Jul 26 2018 07:54:13
%S 1,-1,13,-373,19097,-1522409,174263717,-27072485469,5477315064625,
%T -1398343023229393,439386703590146365,-166541598232670049093,
%U 74891796652158938855881,-39404384075265527597485241
%N Expansion of e.g.f. cos(tanh(sin(x))), even powers only.
%H G. C. Greubel, <a href="/A009085/b009085.txt">Table of n, a(n) for n = 0..230</a>
%p seq(coeff(series(factorial(n)*cos(tanh(sin(x))), x,n+1),x,n),n=0..30,2); # _Muniru A Asiru_, Jul 25 2018
%t With[{nn=30},Take[CoefficientList[Series[Cos[Tanh[Sin[x]]],{x,0,nn}],x] Range[0,nn]!,{1,-1,2}]] (* _Harvey P. Dale_, Nov 20 2015 *)
%o (PARI) x='x+O('x^50); v=Vec(serlaplace(cos(tanh(sin(x))))); vector(#v\2,n,v[2*n-1]) \\ _G. C. Greubel_, Jul 25 2018
%K sign
%O 0,3
%A _R. H. Hardin_
%E Extended with signs by _Olivier Gérard_, Mar 15 1997
%E Prior Mathematica program replaced by _Harvey P. Dale_, Nov 20 2015
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