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

Terms

a(0) =2a(1) =11a(2) =123a(3) =1364a(4) =15127a(5) =167761a(6) =1860498a(7) =20633239a(8) =228826127a(9) =2537720636a(10) =28143753123a(11) =312119004989