Numbers k such that (5*10^k - 107)/3 is prime.

Terms

a(0) =2a(1) =4a(2) =5a(3) =7a(4) =8a(5) =10a(6) =46a(7) =60a(8) =204a(9) =324a(10) =348a(11) =1268a(12) =1525a(13) =2152a(14) =2250a(15) =3398a(16) =4073a(17) =4939a(18) =6835a(19) =12502a(20) =26012a(21) =28339a(22) =50861a(23) =53855a(24) =84469a(25) =86011