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

Terms

a(0) =0a(1) =1a(2) =-1a(3) =1a(4) =-12a(5) =75a(6) =-555a(7) =4863a(8) =-48832a(9) =552293a(10) =-6948765a(11) =96252429a(12) =-1455398604a(13) =23851683999a(14) =-421107222263