Numbers k such that 8*10^k - 13 is prime.

Terms

a(0) =1a(1) =2a(2) =4a(3) =7a(4) =8a(5) =13a(6) =23a(7) =28a(8) =37a(9) =40a(10) =107a(11) =132a(12) =156a(13) =290a(14) =295a(15) =653a(16) =948a(17) =2292a(18) =4727a(19) =6188a(20) =7340a(21) =24326a(22) =34031a(23) =41026a(24) =66848a(25) =104893a(26) =106157a(27) =125088a(28) =230921a(29) =295160