%I #19 Apr 09 2014 04:27:15
%S 1,1,0,-2,-8,-24,-56,-104,512,5824,54912,385408,2590336,15920256,
%T 69311488,160063744,-3936710656,-67251703808,-914002857984,
%U -9821117788160,-81770855727104,-551206277726208,2175764106870784,106679023552528384
%N Expansion of exp(x)/cosh(tan(x)).
%H Vincenzo Librandi, <a href="/A009297/b009297.txt">Table of n, a(n) for n = 0..200</a>
%t With[{nn=30},CoefficientList[Series[Exp[x]/Cosh[Tan[x]],{x,0,nn}], x]Range[0,nn]!] (* _Harvey P. Dale_, Apr 22 2012 *)
%Y Cf. A009107.
%K sign,easy
%O 0,4
%A _R. H. Hardin_
%E Extended with signs by _Olivier GĂ©rard_, Mar 15 1997