a(n) = floor(Gamma(n+11/12)/Gamma(11/12)).

Terms

a(0) =1a(1) =0a(2) =1a(3) =5a(4) =20a(5) =98a(6) =583a(7) =4038a(8) =31970a(9) =285069a(10) =2826941a(11) =30860773a(12) =367757553a(13) =4750201727a(14) =66106974037a(15) =986095696055