Expansion of exp(3x)/sqrt(1-x^2).

Terms

a(0) =1a(1) =3a(2) =10a(3) =36a(4) =144a(5) =648a(6) =3384a(7) =20520a(8) =145728a(9) =1181952a(10) =10917504a(11) =111601152a(12) =1265777280a(13) =15544566144a(14) =208320719616