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%I #9 Jun 19 2022 18:46:50
%S 0,0,2,-3,0,-10,400,-3276,12768,-72864,1933888,-32108560,322393280,
%T -3122225184,60417280768,-1349906937120,23068109840384,
%U -351887538631168,6985288388898816,-174933529672527360
%N Expansion of e.g.f.: tan(tanh(x) * log(x+1)).
%e 2/2!*x^2 - 3/3!*x^3 - 10/5!*x^5 + 400/6!*x^6 ...
%t With[{nn=20},CoefficientList[Series[Tan[Tanh[x]Log[x+1]],{x,0,nn}],x] Range[0,nn]!] (* _Harvey P. Dale_, Jun 19 2022 *)
%K sign
%O 0,3
%A Patrick Demichel (patrick.demichel(AT)hp.com)
%E a(0) and a(1) inserted and title improved by _Sean A. Irvine_, Jul 23 2018