Numbers whose base-11 representation has the same nonzero number of 7's and 8's.

Terms

a(0) =85a(1) =95a(2) =206a(3) =216a(4) =327a(5) =337a(6) =448a(7) =458a(8) =569a(9) =579a(10) =690a(11) =700a(12) =811a(13) =821a(14) =855a(15) =866a(16) =877a(17) =888a(18) =899a(19) =910a(20) =921a(21) =935a(22) =936a(23) =937a(24) =938a(25) =939a(26) =940a(27) =941a(28) =944a(29) =945