Numbers whose base-10 representation has the same nonzero number of 4's and 8's.

Terms

a(0) =48a(1) =84a(2) =148a(3) =184a(4) =248a(5) =284a(6) =348a(7) =384a(8) =408a(9) =418a(10) =428a(11) =438a(12) =458a(13) =468a(14) =478a(15) =480a(16) =481a(17) =482a(18) =483a(19) =485a(20) =486a(21) =487a(22) =489a(23) =498a(24) =548a(25) =584a(26) =648a(27) =684a(28) =748a(29) =784