Expansion of cos x (1 + sin x ) /cos 2x.

Terms

a(0) =1a(1) =1a(2) =3a(3) =8a(4) =57a(5) =256a(6) =2763a(7) =17408a(8) =250737a(9) =2031616a(10) =36581523a(11) =362283008a(12) =7828053417a(13) =91620376576