a(n) = 11*a(n-1) + 10*a(n-2).

Terms

a(0) =0a(1) =1a(2) =11a(3) =131a(4) =1551a(5) =18371a(6) =217591a(7) =2577211a(8) =30525231a(9) =361549651a(10) =4282298471a(11) =50720779691a(12) =600751561311