a(n) = 14*a(n-1) - a(n-2), with a(1) = a(2) = 1.

A122571

a(n) = 14*a(n-1) - a(n-2), with a(1) = a(2) = 1.

Terms

    a(0) =1a(1) =1a(2) =13a(3) =181a(4) =2521a(5) =35113a(6) =489061a(7) =6811741a(8) =94875313a(9) =1321442641a(10) =18405321661a(11) =256353060613

External references