Numbers k such that 89*10^k - 9 is prime.

Terms

a(0) =1a(1) =7a(2) =13a(3) =44a(4) =73a(5) =128a(6) =152a(7) =245a(8) =408a(9) =436a(10) =618a(11) =638a(12) =884a(13) =1405a(14) =1502a(15) =1656a(16) =2292a(17) =2318a(18) =4212a(19) =5712a(20) =5868a(21) =13837a(22) =18648a(23) =25102a(24) =30742a(25) =34532a(26) =53951a(27) =159258