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

Terms

a(0) =0a(1) =0a(2) =2a(3) =-3a(4) =16a(5) =-50a(6) =80a(7) =924a(8) =-24544a(9) =320832a(10) =-4041152a(11) =44762960a(12) =-443911360a(13) =3134031264a(14) =10007901696