a(n) = 5*(10^n - 3).

A177079

a(n) = 5*(10^n - 3).

Terms

    a(0) =35a(1) =485a(2) =4985a(3) =49985a(4) =499985a(5) =4999985a(6) =49999985a(7) =499999985a(8) =4999999985a(9) =49999999985a(10) =499999999985

External references