a(n) = 3*(10^n - 1).

A086574

a(n) = 3*(10^n - 1).

Terms

    a(0) =0a(1) =27a(2) =297a(3) =2997a(4) =29997a(5) =299997a(6) =2999997a(7) =29999997a(8) =299999997a(9) =2999999997a(10) =29999999997a(11) =299999999997

External references