a(n) = 81*10^(n-2), a(0)=1, a(1)=8.

Terms

a(0) =1a(1) =8a(2) =81a(3) =810a(4) =8100a(5) =81000a(6) =810000a(7) =8100000a(8) =81000000a(9) =810000000a(10) =8100000000a(11) =81000000000a(12) =810000000000