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%I #13 Aug 03 2018 04:23:26
%S 0,0,-1,1,-6,23,-90,509,-1960,7251,27720,-1167421,20353608,-322757359,
%T 4828920096,-72221046535,1088176720800,-16527535024457,
%U 253611377594496,-3894220888850401,59159990565014280
%N Expansion of e.g.f. tanh(log(x+1) - sinh(x)).
%e -(1/2!)*x^2 + (1/3!)*x^3 - (6/4!)*x^4 + (23/5!)*x^5 - ...
%t With[{nn=20},Drop[CoefficientList[Series[Tanh[Log[x+1]-Sinh[x]],{x,0,nn}],x] Range[0,nn]!,2]] (* _Harvey P. Dale_, May 24 2017 *)
%o (PARI) x = 'x + O('x^30); concat([0, 0], Vec(serlaplace(tanh(log(x+1) - sinh(x))))) \\ _Michel Marcus_, Aug 03 2018
%K sign
%O 0,5
%A Patrick Demichel (patrick.demichel(AT)hp.com)
%E a(0)=a(1)=0 inserted and title improved by _Sean A. Irvine_, Aug 02 2018
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