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

Terms

a(0) =0a(1) =1a(2) =-1a(3) =1a(4) =0a(5) =-2a(6) =-30a(7) =446a(8) =-3248a(9) =12412a(10) =16020a(11) =-211356a(12) =-10756944a(13) =284038272a(14) =-3556910448a(15) =19122463296a(16) =135073768320