Numbers k such that (77*10^k - 59)/9 is prime.

Terms

a(0) =0a(1) =1a(2) =4a(3) =6a(4) =12a(5) =28a(6) =39a(7) =58a(8) =73a(9) =102a(10) =141a(11) =409a(12) =423a(13) =567a(14) =831a(15) =930a(16) =1515a(17) =2619a(18) =5727a(19) =9235a(20) =12706a(21) =13189a(22) =37182a(23) =73917