Primes not containing the digit '4'.

Terms

a(0) =2a(1) =3a(2) =5a(3) =7a(4) =11a(5) =13a(6) =17a(7) =19a(8) =23a(9) =29a(10) =31a(11) =37a(12) =53a(13) =59a(14) =61a(15) =67a(16) =71a(17) =73a(18) =79a(19) =83a(20) =89a(21) =97a(22) =101a(23) =103a(24) =107a(25) =109a(26) =113a(27) =127a(28) =131a(29) =137