Numbers whose base-8 representation has the same number of 2's and 7's.

Terms

a(0) =0a(1) =1a(2) =3a(3) =4a(4) =5a(5) =6a(6) =8a(7) =9a(8) =11a(9) =12a(10) =13a(11) =14a(12) =23a(13) =24a(14) =25a(15) =27a(16) =28a(17) =29a(18) =30a(19) =32a(20) =33a(21) =35a(22) =36a(23) =37a(24) =38a(25) =40a(26) =41a(27) =43a(28) =44a(29) =45