Numbers k such that 7*10^k + 13 is prime.

Terms

a(0) =1a(1) =3a(2) =9a(3) =12a(4) =18a(5) =19a(6) =36a(7) =37a(8) =49a(9) =67a(10) =337a(11) =893a(12) =1924a(13) =8044a(14) =11610a(15) =13560a(16) =18777a(17) =35376a(18) =53601a(19) =56022a(20) =66488a(21) =89801a(22) =190210