[ exp(5/12)*n! ].

Terms

a(0) =1a(1) =3a(2) =9a(3) =36a(4) =182a(5) =1092a(6) =7645a(7) =61161a(8) =550451a(9) =5504515a(10) =60549666a(11) =726595992a(12) =9445747902a(13) =132240470635