Expansion of e.g.f. sin(x)/cosh(log(1+x)).

Terms

a(0) =0a(1) =1a(2) =0a(3) =-4a(4) =12a(5) =-19a(6) =-60a(7) =818a(8) =-4872a(9) =14401a(10) =75240a(11) =-1619696a(12) =14470500a(13) =-61780211a(14) =-451892532a(15) =13265310134a(16) =-158017858320a(17) =882221413217