A386068 Primes having only {0, 3, 7, 9} as digits.
3, 7, 37, 73, 79, 97, 307, 337, 373, 379, 397, 709, 733, 739, 773, 797, 907, 937, 977, 997, 3037, 3079, 3307, 3373, 3709, 3733, 3739, 3779, 3793, 3797, 3907, 7039, 7079, 7307, 7309, 7333, 7393, 7703, 7793, 7907, 7933, 7937, 7993, 9007, 9337, 9377, 9397, 9733
Offset: 1