Ceiling of Gamma(n+5/9)/Gamma(5/9).

Terms

a(0) =1a(1) =1a(2) =1a(3) =3a(4) =8a(5) =36a(6) =199a(7) =1303a(8) =9844a(9) =84217a(10) =804739a(11) =8494461a(12) =98158214a(13) =1232430909a(14) =16706285647a(15) =243169268857