Numbers k such that (35*10^k - 197)/9 is prime.

Terms

a(0) =1a(1) =2a(2) =4a(3) =7a(4) =8a(5) =19a(6) =26a(7) =28a(8) =38a(9) =43a(10) =67a(11) =331a(12) =359a(13) =832a(14) =907a(15) =1880a(16) =2359a(17) =4301a(18) =5896a(19) =6187a(20) =37154a(21) =40411a(22) =59584