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

Terms

a(0) =0a(1) =0a(2) =-1a(3) =4a(4) =-6a(5) =8a(6) =-90a(7) =152a(8) =6440a(9) =-69984a(10) =451080a(11) =-4819168a(12) =67077648a(13) =-533622208a(14) =882593712a(15) =16010702528a(16) =-325947073920