[ exp(17/22)*n! ].

Terms

a(0) =2a(1) =4a(2) =12a(3) =51a(4) =259a(5) =1559a(6) =10914a(7) =87319a(8) =785876a(9) =7858763a(10) =86446399a(11) =1037356791a(12) =13485638291a(13) =188798936078