[ exp(5/17)*n! ].

Terms

a(0) =1a(1) =2a(2) =8a(3) =32a(4) =161a(5) =966a(6) =6763a(7) =54107a(8) =486963a(9) =4869638a(10) =53566021a(11) =642792254a(12) =8356299313a(13) =116988190388