9^n mod 8^n.

Terms

a(0) =0a(1) =1a(2) =17a(3) =217a(4) =2465a(5) =26281a(6) =7153a(7) =588665a(8) =9492289a(9) =118985033a(10) =265558929a(11) =5611255833a(12) =7551629537a(13) =342842572777a(14) =886559899441