Expansion of tan(log(1+x))*log(1+x)/2.

Terms

a(0) =0a(1) =0a(2) =1a(3) =-3a(4) =15a(5) =-90a(6) =662a(7) =-5712a(8) =56688a(9) =-635616a(10) =7944640a(11) =-109494880a(12) =1649256800a(13) =-26948575680a(14) =474694809920