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%I #7 Aug 01 2018 22:05:09
%S 0,1,-2,3,-8,53,-320,1799,-14464,154985,-1601152,16589771,-211517440,
%T 3172731677,-47440986112,721614303695,-12501759557632,241340829836497,
%U -4730336839303168,94965599172723859
%N Expansion of e.g.f. log(sech(x) + arctan(x)).
%e x - 2/2!*x^2 + 3/3!*x^3 - 8/4!*x^4 + 53/5!*x^5 ...
%K sign
%O 0,3
%A Patrick Demichel (patrick.demichel(AT)hp.com)
%E a(0)=0 inserted and title improved by _Sean A. Irvine_, Aug 01 2018
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