a(n) = 8*a(n-1) - a(n-2); a(0) = 0, a(1) = 1.

Terms

a(0) =0a(1) =1a(2) =8a(3) =63a(4) =496a(5) =3905a(6) =30744a(7) =242047a(8) =1905632a(9) =15003009a(10) =118118440a(11) =929944511a(12) =7321437648a(13) =57641556673a(14) =453811015736