A110573 Numbers n such that the string 666n is prime.

1, 17, 29, 43, 53, 83, 97, 109, 119, 139, 143, 167, 173, 187, 191, 203, 229, 233, 269, 277, 301, 329, 353, 403, 427, 431, 433, 437, 439, 461, 467, 493, 511, 527, 529, 541, 557, 559, 599, 607, 637, 643, 647, 649, 667, 671, 683, 697, 707, 727, 733, 737, 749