Numbers whose base-12 representation has the same nonzero number of 6's and 9's.

Terms

a(0) =81a(1) =114a(2) =225a(3) =258a(4) =369a(5) =402a(6) =513a(7) =546a(8) =657a(9) =690a(10) =801a(11) =834a(12) =873a(13) =885a(14) =897a(15) =909a(16) =921a(17) =933a(18) =957a(19) =969a(20) =972a(21) =973a(22) =974a(23) =975a(24) =976a(25) =977a(26) =979a(27) =980a(28) =982a(29) =983