a(n) = 11*a(n-1) + 9*a(n-2).

Terms

a(0) =0a(1) =1a(2) =11a(3) =130a(4) =1529a(5) =17989a(6) =211640a(7) =2489941a(8) =29294111a(9) =344644690a(10) =4054738589a(11) =47703926689a(12) =561235840880