Numbers whose base-12 representation has the same nonzero number of 4's and 9's.

Terms

a(0) =57a(1) =112a(2) =201a(3) =256a(4) =345a(5) =400a(6) =489a(7) =544a(8) =585a(9) =597a(10) =609a(11) =621a(12) =645a(13) =657a(14) =669a(15) =681a(16) =684a(17) =685a(18) =686a(19) =687a(20) =689a(21) =690a(22) =691a(23) =692a(24) =694a(25) =695a(26) =705a(27) =717a(28) =777a(29) =832