a(n) = a(n-1) - 64*a(n-2), a(0)=1, a(1)=8.

Terms

a(0) =1a(1) =8a(2) =-56a(3) =-568a(4) =3016a(5) =39368a(6) =-153656a(7) =-2673208a(8) =7160776a(9) =178246088a(10) =-280043576a(11) =-11687793208a(12) =6234995656a(13) =754253760968a(14) =355214038984