Ceiling of Gamma(n+9/10)/Gamma(9/10).

Terms

a(0) =1a(1) =1a(2) =2a(3) =5a(4) =20a(5) =95a(6) =560a(7) =3858a(8) =30478a(9) =271253a(10) =2685396a(11) =29270807a(12) =348322597a(13) =4493361501a(14) =62457724854a(15) =930620100319