Numbers k such that (46*10^k + 521)/9 is prime.

Terms

a(0) =1a(1) =2a(2) =4a(3) =5a(4) =8a(5) =29a(6) =43a(7) =62a(8) =85a(9) =107a(10) =172a(11) =557a(12) =1043a(13) =2395a(14) =4498a(15) =5818a(16) =7772a(17) =9125a(18) =12616a(19) =17252a(20) =23000a(21) =64904a(22) =71077a(23) =113162