Expansion of e.g.f. = sin(tan(log(1+x))).

Terms

a(0) =0a(1) =1a(2) =-1a(3) =3a(4) =-12a(5) =56a(6) =-300a(7) =1544a(8) =-4592a(9) =-74068a(10) =2546820a(11) =-58043956a(12) =1226919936a(13) =-25894069928a(14) =560051913512