Numbers whose base-11 representation has the same nonzero number of 6's and 9's.

Terms

a(0) =75a(1) =105a(2) =196a(3) =226a(4) =317a(5) =347a(6) =438a(7) =468a(8) =559a(9) =589a(10) =680a(11) =710a(12) =735a(13) =746a(14) =757a(15) =768a(16) =779a(17) =790a(18) =812a(19) =823a(20) =825a(21) =826a(22) =827a(23) =828a(24) =829a(25) =830a(26) =832a(27) =833a(28) =835a(29) =845