Delete all 4's from the sequence of nonnegative integers.

Terms

a(0) =0a(1) =1a(2) =2a(3) =3a(4) =5a(5) =6a(6) =7a(7) =8a(8) =9a(9) =10a(10) =11a(11) =12a(12) =13a(13) =1a(14) =15a(15) =16a(16) =17a(17) =18a(18) =19a(19) =20a(20) =21a(21) =22a(22) =23a(23) =2a(24) =25a(25) =26a(26) =27a(27) =28a(28) =29a(29) =30