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

Terms

a(0) =0a(1) =1a(2) =-1a(3) =-1a(4) =0a(5) =-31a(6) =75a(7) =-953a(8) =3976a(9) =-41631a(10) =255375a(11) =-2595825a(12) =21904344a(13) =-229744191a(14) =2548875147a(15) =-28954555113a(16) =403320390960