[ exp(15/16)*n! ].

Terms

a(0) =2a(1) =5a(2) =15a(3) =61a(4) =306a(5) =1838a(6) =12870a(7) =102960a(8) =926646a(9) =9266465a(10) =101931119a(11) =1223173436a(12) =15901254670a(13) =222617565380