Numbers whose base-11 representation has the same nonzero number of 3's and 7's.

Terms

a(0) =40a(1) =80a(2) =161a(3) =201a(4) =282a(5) =322a(6) =370a(7) =381a(8) =392a(9) =414a(10) =425a(11) =436a(12) =440a(13) =441a(14) =442a(15) =444a(16) =445a(17) =446a(18) =448a(19) =449a(20) =450a(21) =458a(22) =469a(23) =480a(24) =524a(25) =564a(26) =645a(27) =685a(28) =766a(29) =806