Primes that contain digits 3 and 5 only.

Terms

a(0) =3a(1) =5a(2) =53a(3) =353a(4) =3533a(5) =5333a(6) =33353a(7) =33533a(8) =35353a(9) =35533a(10) =53353a(11) =55333a(12) =333533a(13) =353333a(14) =533353a(15) =535333a(16) =3335533a(17) =3353333a(18) =3353533a(19) =3355553a(20) =3533533a(21) =3553553a(22) =3555353a(23) =5333353a(24) =5333533a(25) =5353553a(26) =5533553a(27) =33335333a(28) =33555553a(29) =35535553