Expansion of tan(log(1+x)).

Terms

a(0) =0a(1) =1a(2) =-1a(3) =4a(4) =-18a(5) =110a(6) =-810a(7) =7040a(8) =-70280a(9) =792200a(10) =-9945000a(11) =137550400a(12) =-2077719600a(13) =34026132400a(14) =-600433397200