Numbers whose base-11 representation has the same nonzero number of 7's and 9's.

Terms

a(0) =86a(1) =106a(2) =207a(3) =227a(4) =328a(5) =348a(6) =449a(7) =469a(8) =570a(9) =590a(10) =691a(11) =711a(12) =812a(13) =832a(14) =856a(15) =867a(16) =878a(17) =889a(18) =900a(19) =911a(20) =922a(21) =944a(22) =946a(23) =947a(24) =948a(25) =949a(26) =950a(27) =951a(28) =952a(29) =954