Numbers whose base-6 representation has the same number of 0's as 5's.

Terms

a(0) =1a(1) =2a(2) =3a(3) =4a(4) =7a(5) =8a(6) =9a(7) =10a(8) =13a(9) =14a(10) =15a(11) =16a(12) =19a(13) =20a(14) =21a(15) =22a(16) =25a(17) =26a(18) =27a(19) =28a(20) =30a(21) =41a(22) =43a(23) =44a(24) =45a(25) =46a(26) =49a(27) =50a(28) =51a(29) =52