a(n) = 11*a(n-1) + 7*a(n-2).

Terms

a(0) =0a(1) =1a(2) =11a(3) =128a(4) =1485a(5) =17231a(6) =199936a(7) =2319913a(8) =26918595a(9) =312343936a(10) =3624213461a(11) =42052755623a(12) =487949806080