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

Terms

a(0) =0a(1) =0a(2) =-1a(3) =0a(4) =-6a(5) =8a(6) =-90a(7) =448a(8) =-2520a(9) =26336a(10) =-113400a(11) =1722688a(12) =-6419952a(13) =101489984a(14) =-67603536a(15) =-3543539456a(16) =187400653440