Primes having only {0, 4, 5, 7} as digits.

Terms

a(0) =5a(1) =7a(2) =47a(3) =457a(4) =547a(5) =557a(6) =577a(7) =757a(8) =4007a(9) =4057a(10) =4447a(11) =4457a(12) =4507a(13) =4547a(14) =5077a(15) =5407a(16) =5477a(17) =5507a(18) =5557a(19) =7057a(20) =7457a(21) =7477a(22) =7507a(23) =7547a(24) =7577a(25) =7757a(26) =40507a(27) =40577a(28) =44507a(29) =44777