Numbers k such that (38*10^k + 403)/9 is prime.

Terms

a(0) =2a(1) =5a(2) =8a(3) =11a(4) =15a(5) =17a(6) =87a(7) =146a(8) =201a(9) =287a(10) =383a(11) =489a(12) =527a(13) =4077a(14) =5102a(15) =7769a(16) =22715a(17) =25077a(18) =37425a(19) =82161a(20) =180296