Primes having only {0, 1, 4} as digits.

Terms

a(0) =11a(1) =41a(2) =101a(3) =401a(4) =4001a(5) =4111a(6) =4441a(7) =10111a(8) =10141a(9) =11411a(10) =14011a(11) =14401a(12) =14411a(13) =40111a(14) =41011a(15) =41141a(16) =41411a(17) =44041a(18) =44101a(19) =44111a(20) =100411a(21) =101111a(22) =101141a(23) =101411a(24) =110441a(25) =114001a(26) =114041a(27) =140111a(28) =140401a(29) =140411