[ exp(23/24)*n! ].

Terms

a(0) =2a(1) =5a(2) =15a(3) =62a(4) =312a(5) =1877a(6) =13141a(7) =105128a(8) =946154a(9) =9461541a(10) =104076959a(11) =1248923514a(12) =16236005691a(13) =227304079677