Numbers k such that R(k+9) = 3.

Terms

a(0) =21a(1) =291a(2) =2991a(3) =29991a(4) =299991a(5) =2999991a(6) =29999991a(7) =299999991a(8) =2999999991a(9) =29999999991a(10) =299999999991