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

Terms

a(0) =1a(1) =0a(2) =0a(3) =0a(4) =-12a(5) =60a(6) =-570a(7) =3780a(8) =-33600a(9) =266112a(10) =-2452200a(11) =21323280a(12) =-195333336a(13) =1587135264a(14) =-9944442144a(15) =-30963922080