Numbers whose base-8 representation has the same nonzero number of 1's and 4's.

Terms

a(0) =12a(1) =33a(2) =68a(3) =84a(4) =92a(5) =96a(6) =98a(7) =99a(8) =101a(9) =102a(10) =103a(11) =108a(12) =116a(13) =124a(14) =140a(15) =161a(16) =204a(17) =225a(18) =257a(19) =264a(20) =266a(21) =267a(22) =269a(23) =270a(24) =271a(25) =273a(26) =281a(27) =297a(28) =305a(29) =313