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

Terms

a(0) =0a(1) =1a(2) =-3a(3) =10a(4) =-40a(5) =205a(6) =-1287a(7) =9714a(8) =-85384a(9) =859889a(10) =-9751651a(11) =123102098a(12) =-1711387808a(13) =25985945453a(14) =-427828028695