[ exp(9/16)*n! ].

Terms

a(0) =1a(1) =3a(2) =10a(3) =42a(4) =210a(5) =1263a(6) =8845a(7) =70763a(8) =636874a(9) =6368742a(10) =70056165a(11) =840673988a(12) =10928761854a(13) =153002665956