Numbers whose base-12 representation has the same nonzero number of 5's and 7's.

Terms

a(0) =67a(1) =89a(2) =211a(3) =233a(4) =355a(5) =377a(6) =499a(7) =521a(8) =643a(9) =665a(10) =727a(11) =739a(12) =751a(13) =763a(14) =775a(15) =799a(16) =804a(17) =805a(18) =806a(19) =807a(20) =808a(21) =810a(22) =812a(23) =813a(24) =814a(25) =815a(26) =823a(27) =835a(28) =847a(29) =859