Numbers whose base-6 representation has the same number of 2's and 5's.

Terms

a(0) =0a(1) =1a(2) =3a(3) =4a(4) =6a(5) =7a(6) =9a(7) =10a(8) =17a(9) =18a(10) =19a(11) =21a(12) =22a(13) =24a(14) =25a(15) =27a(16) =28a(17) =32a(18) =36a(19) =37a(20) =39a(21) =40a(22) =42a(23) =43a(24) =45a(25) =46a(26) =53a(27) =54a(28) =55a(29) =57