Numbers k such that (52*10^k - 1)/3 is prime.

Terms

a(0) =0a(1) =1a(2) =2a(3) =3a(4) =8a(5) =9a(6) =19a(7) =20a(8) =24a(9) =28a(10) =70a(11) =102a(12) =123a(13) =344a(14) =2228a(15) =3282a(16) =4554a(17) =5370a(18) =5830a(19) =12328a(20) =21742a(21) =27937a(22) =49261a(23) =89037