A024766 Every prefix prime in base 6 (written in base 6).
2, 3, 5, 21, 25, 31, 35, 51, 211, 215, 251, 255, 351, 515, 2115, 2151, 2155, 2511, 2551, 2555, 3515, 5155, 21155, 21515, 21551, 21555, 25115, 25515, 35155, 51551, 51555, 215515, 215555, 515511, 515551, 2155555
Offset: 1