Primes having only {1, 4, 5} as digits.

Terms

a(0) =5a(1) =11a(2) =41a(3) =151a(4) =541a(5) =1151a(6) =1451a(7) =1511a(8) =4111a(9) =4441a(10) =4451a(11) =5441a(12) =11411a(13) =11551a(14) =14411a(15) =14551a(16) =15451a(17) =15511a(18) =15541a(19) =15551a(20) =41141a(21) =41411a(22) =44111a(23) =45541a(24) =51151a(25) =51511a(26) =51551a(27) =54151a(28) =54541a(29) =55411