Numbers k such that (26*10^k + 61)/3 is prime.

Terms

a(0) =0a(1) =1a(2) =2a(3) =8a(4) =10a(5) =17a(6) =18a(7) =30a(8) =37a(9) =42a(10) =47a(11) =100a(12) =286a(13) =287a(14) =440a(15) =1074a(16) =1124a(17) =2298a(18) =2879a(19) =4948a(20) =4950a(21) =12730a(22) =17429a(23) =31768a(24) =47726a(25) =64220a(26) =80200a(27) =127240