%I #7 Aug 01 2018 23:01:31
%S 0,0,-1,1,-6,15,-90,285,-1960,2275,-12600,-877725,9088200,-206895975,
%T 2291088800,-43975670375,519884196000,-10108488755625,124295092272000,
%U -2588043770222625,31717643136725000
%N Expansion of e.g.f. tanh(log(x+1) - arcsin(x)).
%e -1/2!*x^2 + 1/3!*x^3 - 6/4!*x^4 + 15/5!*x^5 ...
%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 01 2018
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