Numbers k such that (2*10^k + 457)/9 is prime.

Terms

a(0) =1a(1) =2a(2) =4a(3) =5a(4) =7a(5) =8a(6) =11a(7) =13a(8) =20a(9) =22a(10) =38a(11) =47a(12) =76a(13) =269a(14) =299a(15) =527a(16) =724a(17) =1214a(18) =2243a(19) =2327a(20) =12635a(21) =15064a(22) =28921a(23) =34303a(24) =49117a(25) =58151a(26) =89279a(27) =199283