Expansion of e.g.f. log(1/(1-artanh(x))).

Terms

a(0) =0a(1) =1a(2) =1a(3) =4a(4) =14a(5) =88a(6) =544a(7) =4688a(8) =41712a(9) =459520a(10) =5333376a(11) =71876352a(12) =1027670016a(13) =16428530688a(14) =278818065408