Expansion of exp(4x)/sqrt(1-x^2).

Terms

a(0) =1a(1) =4a(2) =17a(3) =76a(4) =361a(5) =1844a(6) =10321a(7) =64348a(8) =453329a(9) =3619684a(10) =32666161a(11) =329434604a(12) =3677682937a(13) =44901581716a(14) =595567550321