Numbers whose base-11 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) =14a(10) =22a(11) =24a(12) =26a(13) =27a(14) =28a(15) =29a(16) =30a(17) =31a(18) =32a(19) =34a(20) =44a(21) =46a(22) =48a(23) =49a(24) =50a(25) =51a(26) =52a(27) =53a(28) =54a(29) =55