Numbers whose base-10 representation has the same nonzero number of 3's and 4's.

Terms

a(0) =34a(1) =43a(2) =134a(3) =143a(4) =234a(5) =243a(6) =304a(7) =314a(8) =324a(9) =340a(10) =341a(11) =342a(12) =345a(13) =346a(14) =347a(15) =348a(16) =349a(17) =354a(18) =364a(19) =374a(20) =384a(21) =394a(22) =403a(23) =413a(24) =423a(25) =430a(26) =431a(27) =432a(28) =435a(29) =436