Numbers k such that (26*10^k - 503)/9 is prime.

Terms

a(0) =2a(1) =3a(2) =5a(3) =15a(4) =23a(5) =32a(6) =38a(7) =60a(8) =239a(9) =279a(10) =396a(11) =599a(12) =797a(13) =4341a(14) =7041a(15) =10103a(16) =20496a(17) =24285a(18) =33156a(19) =46694a(20) =49427a(21) =51537a(22) =104132a(23) =116999a(24) =151391