%I #7 Jul 31 2018 22:30:23
%S 0,2,-1,-4,18,146,-1425,-7592,210028,559322,-50827005,106120692,
%T 17584275654,-154934766198,-8006009893245,152561646167328,
%U 4407064919207640,-159846661630850958,-2597264235213998553
%N Expansion of e.g.f. arcsinh(arctanh(x) + log(x+1)).
%e 2*x - 1/2!*x^2 - 4/3!*x^3 + 18/4!*x^4 + 146/5!*x^5 ...
%K sign
%O 0,2
%A Patrick Demichel (patrick.demichel(AT)hp.com)
%E a(0)=0 inserted and title improved by _Sean A. Irvine_, Jul 31 2018