Primes having only {1, 3, 4} as digits.

Terms

a(0) =3a(1) =11a(2) =13a(3) =31a(4) =41a(5) =43a(6) =113a(7) =131a(8) =311a(9) =313a(10) =331a(11) =431a(12) =433a(13) =443a(14) =1433a(15) =3313a(16) =3331a(17) =3343a(18) =3413a(19) =3433a(20) =4111a(21) =4133a(22) =4441a(23) =11113a(24) =11131a(25) =11311a(26) =11411a(27) =11443a(28) =13313a(29) =13331