a(n) = floor(11^n/8^n).

Terms

a(0) =1a(1) =1a(2) =1a(3) =2a(4) =3a(5) =4a(6) =6a(7) =9a(8) =12a(9) =17a(10) =24a(11) =33a(12) =45a(13) =62a(14) =86a(15) =118a(16) =163a(17) =224a(18) =308a(19) =424a(20) =583a(21) =802a(22) =1103a(23) =1516a(24) =2085a(25) =2867a(26) =3943a(27) =5422a(28) =7455a(29) =10251