A069681 Primes with either no internal digits or all internal digits are 6.
2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97, 163, 167, 263, 269, 367, 461, 463, 467, 563, 569, 661, 761, 769, 863, 967, 1663, 1667, 1669, 2663, 4663, 5669, 6661, 7669, 8663, 8669, 9661, 16661, 26669, 46663, 56663
Offset: 1
Extensions
Corrected by Ray Chandler, Nov 24 2003
Offset corrected and name changed by Arkadiusz Wesolowski, Sep 07 2011