Numbers whose base-8 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) =11a(7) =16a(8) =18a(9) =20a(10) =21a(11) =22a(12) =23a(13) =25a(14) =32a(15) =34a(16) =36a(17) =37a(18) =38a(19) =39a(20) =40a(21) =42a(22) =44a(23) =45a(24) =46a(25) =47a(26) =48a(27) =50a(28) =52a(29) =53