a(n) = 11*a(n-1) + 12*a(n-2).

Terms

a(0) =0a(1) =1a(2) =11a(3) =133a(4) =1595a(5) =19141a(6) =229691a(7) =2756293a(8) =33075515a(9) =396906181a(10) =4762874171a(11) =57154490053a(12) =685853880635