Numbers k such that R(k+9) = 5.

Terms

a(0) =41a(1) =491a(2) =4991a(3) =49991a(4) =499991a(5) =4999991a(6) =49999991a(7) =499999991a(8) =4999999991a(9) =49999999991a(10) =499999999991