Expansion of (1-2*x)/(1-10*x).

Terms

a(0) =1a(1) =8a(2) =80a(3) =800a(4) =8000a(5) =80000a(6) =800000a(7) =8000000a(8) =80000000a(9) =800000000a(10) =8000000000a(11) =80000000000a(12) =800000000000