[ exp(10/19)*n! ].

Terms

a(0) =1a(1) =3a(2) =10a(3) =40a(4) =203a(5) =1218a(6) =8531a(7) =68249a(8) =614241a(9) =6142413a(10) =67566552a(11) =810798631a(12) =10540382214a(13) =147565350997