a(n) = (8*10^n - 53)/9 for n > 0.

Terms

a(0) =3a(1) =83a(2) =883a(3) =8883a(4) =88883a(5) =888883a(6) =8888883a(7) =88888883a(8) =888888883a(9) =8888888883a(10) =88888888883a(11) =888888888883