Numbers whose base-8 representation has the same number of 2's and 4's.

Terms

a(0) =0a(1) =1a(2) =3a(3) =5a(4) =6a(5) =7a(6) =8a(7) =9a(8) =11a(9) =13a(10) =14a(11) =15a(12) =20a(13) =24a(14) =25a(15) =27a(16) =29a(17) =30a(18) =31a(19) =34a(20) =40a(21) =41a(22) =43a(23) =45a(24) =46a(25) =47a(26) =48a(27) =49a(28) =51a(29) =53