Numbers whose base-8 representation has the same number of 0's and 3's.

Terms

a(0) =1a(1) =2a(2) =4a(3) =5a(4) =6a(5) =7a(6) =9a(7) =10a(8) =12a(9) =13a(10) =14a(11) =15a(12) =17a(13) =18a(14) =20a(15) =21a(16) =22a(17) =23a(18) =24a(19) =33a(20) =34a(21) =36a(22) =37a(23) =38a(24) =39a(25) =41a(26) =42a(27) =44a(28) =45a(29) =46