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%I #10 Jul 27 2018 04:35:36
%S 0,1,-1,7,-24,203,-1575,17869,-208152,2978653,-45883485,806530811,
%T -15347080848,321642878919,-7260372461251,177107309744065,
%U -4619185786492560,128667734086725657,-3805156334531373561
%N Expansion of e.g.f. arctanh(cosh(x) * log(x+1)).
%e x - 1/2!*x^2 + 7/3!*x^3 - 24/4!*x^4 + 203/5!*x^5 ...
%t Range[0, 20]! CoefficientList[ Series[ ArcTanh[ Cosh[x] Log[x + 1]], {x, 0, 20}], x] (* _Robert G. Wilson v_, Jul 24 2018 *)
%K sign
%O 0,4
%A Patrick Demichel (patrick.demichel(AT)hp.com)
%E a(0) inserted and title improved by _Sean A. Irvine_, Jul 24 2018
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