Numbers k such that (56*10^k + 403)/9 is prime.

Terms

a(0) =1a(1) =7a(2) =8a(3) =11a(4) =35a(5) =37a(6) =49a(7) =127a(8) =149a(9) =188a(10) =1214a(11) =3020a(12) =5666a(13) =6254a(14) =7874a(15) =8281a(16) =11095a(17) =13831a(18) =20785a(19) =20854a(20) =31249a(21) =40031a(22) =40450a(23) =63100