Numbers whose base-12 representation has the same number of 1's and 3's.

Terms

a(0) =0a(1) =2a(2) =4a(3) =5a(4) =6a(5) =7a(6) =8a(7) =9a(8) =10a(9) =11a(10) =15a(11) =24a(12) =26a(13) =28a(14) =29a(15) =30a(16) =31a(17) =32a(18) =33a(19) =34a(20) =35a(21) =37a(22) =48a(23) =50a(24) =52a(25) =53a(26) =54a(27) =55a(28) =56a(29) =57