Numbers k such that (58*10^k - 1)/3 is prime.

Terms

a(0) =0a(1) =1a(2) =2a(3) =3a(4) =25a(5) =66a(6) =123a(7) =129a(8) =146a(9) =371a(10) =834a(11) =929a(12) =1361a(13) =1568a(14) =2065a(15) =2220a(16) =3482a(17) =3693a(18) =4776a(19) =13742a(20) =15686a(21) =16473a(22) =21566a(23) =38400