Numbers k such that (85*10^k + 293)/9 is prime.

Terms

a(0) =1a(1) =2a(2) =4a(3) =10a(4) =23a(5) =41a(6) =47a(7) =61a(8) =137a(9) =278a(10) =388a(11) =523a(12) =992a(13) =3716a(14) =4438a(15) =5185a(16) =7553a(17) =9970a(18) =17962a(19) =18568a(20) =36796a(21) =112919a(22) =114737a(23) =116842