Primes having only {3, 5, 6} as digits.

Terms

a(0) =3a(1) =5a(2) =53a(3) =353a(4) =563a(5) =653a(6) =3533a(7) =5333a(8) =5563a(9) =5653a(10) =6353a(11) =6553a(12) =6563a(13) =6653a(14) =33353a(15) =33533a(16) =33563a(17) =35353a(18) =35363a(19) =35533a(20) =36353a(21) =36563a(22) =36653a(23) =53353a(24) =53633a(25) =53653a(26) =55333a(27) =55633a(28) =55663a(29) =56333