Numbers k such that (148*10^k - 1)/3 is prime.

Terms

a(0) =2a(1) =3a(2) =4a(3) =5a(4) =9a(5) =27a(6) =35a(7) =44a(8) =88a(9) =104a(10) =205a(11) =290a(12) =302a(13) =381a(14) =400a(15) =686a(16) =917a(17) =1150a(18) =2278a(19) =2757a(20) =3220a(21) =3316a(22) =7469a(23) =9535a(24) =21442a(25) =46409a(26) =103718a(27) =123688a(28) =147139