Expansion of e.g.f.: 1/(1-log(1+tanh(x))).

Terms

a(0) =1a(1) =1a(2) =1a(3) =0a(4) =-4a(5) =-10a(6) =14a(7) =196a(8) =440a(9) =-3168a(10) =-27856a(11) =-16192a(12) =1164272a(13) =7585552a(14) =-23621872a(15) =-695464800a(16) =-3191206912a(17) =38919085184a(18) =661218763136