a(n) = (17*10^n - 8)/9.

A246059

a(n) = (17*10^n - 8)/9.

Terms

    a(0) =1a(1) =18a(2) =188a(3) =1888a(4) =18888a(5) =188888a(6) =1888888a(7) =18888888a(8) =188888888a(9) =1888888888a(10) =18888888888a(11) =188888888888

External references