Numbers k such that (13*10^k + 89) / 3 is prime.

Terms

a(0) =1a(1) =2a(2) =3a(3) =6a(4) =10a(5) =12a(6) =18a(7) =34a(8) =42a(9) =61a(10) =76a(11) =85a(12) =94a(13) =178a(14) =348a(15) =451a(16) =1123a(17) =1455a(18) =2234a(19) =4519a(20) =7502a(21) =16036a(22) =24216a(23) =156522