Numbers whose base-12 representation has the same nonzero number of 5's and 9's.

Terms

a(0) =69a(1) =113a(2) =213a(3) =257a(4) =357a(5) =401a(6) =501a(7) =545a(8) =645a(9) =689a(10) =729a(11) =741a(12) =753a(13) =765a(14) =777a(15) =801a(16) =813a(17) =825a(18) =828a(19) =829a(20) =830a(21) =831a(22) =832a(23) =834a(24) =835a(25) =836a(26) =838a(27) =839a(28) =849a(29) =861