Numbers whose base-10 representation has the same number of 0's and 3's.

Terms

a(0) =1a(1) =2a(2) =4a(3) =5a(4) =6a(5) =7a(6) =8a(7) =9a(8) =11a(9) =12a(10) =14a(11) =15a(12) =16a(13) =17a(14) =18a(15) =19a(16) =21a(17) =22a(18) =24a(19) =25a(20) =26a(21) =27a(22) =28a(23) =29a(24) =30a(25) =41a(26) =42a(27) =44a(28) =45a(29) =46