Numbers k such that 66 * 10^k + 1 is prime.

Terms

a(0) =0a(1) =1a(2) =4a(3) =5a(4) =11a(5) =30a(6) =60a(7) =64a(8) =869a(9) =1685a(10) =12109a(11) =39684a(12) =65460a(13) =80064