Numbers whose base-6 representation has the same number of 1's and 5's.

Terms

a(0) =0a(1) =2a(2) =3a(3) =4a(4) =11a(5) =12a(6) =14a(7) =15a(8) =16a(9) =18a(10) =20a(11) =21a(12) =22a(13) =24a(14) =26a(15) =27a(16) =28a(17) =31a(18) =41a(19) =53a(20) =59a(21) =65a(22) =66a(23) =68a(24) =69a(25) =70a(26) =72a(27) =74a(28) =75a(29) =76