a(n) = 3*(10^n-7).

A177107

a(n) = 3*(10^n-7).

Terms

    a(0) =9a(1) =279a(2) =2979a(3) =29979a(4) =299979a(5) =2999979a(6) =29999979a(7) =299999979a(8) =2999999979a(9) =29999999979a(10) =299999999979

External references