Numbers whose base-12 representation has the same number of 3's and 7's.

Terms

a(0) =0a(1) =1a(2) =2a(3) =4a(4) =5a(5) =6a(6) =8a(7) =9a(8) =10a(9) =11a(10) =12a(11) =13a(12) =14a(13) =16a(14) =17a(15) =18a(16) =20a(17) =21a(18) =22a(19) =23a(20) =24a(21) =25a(22) =26a(23) =28a(24) =29a(25) =30a(26) =32a(27) =33a(28) =34a(29) =35