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

Terms

a(0) =0a(1) =0a(2) =2a(3) =-3a(4) =0a(5) =-10a(6) =-80a(7) =1764a(8) =-7392a(9) =17856a(10) =-283712a(11) =-729520a(12) =54950720a(13) =-376487904a(14) =2292269824a(15) =-55214177760a(16) =28440387584