Numbers whose base-9 representation has the same nonzero number of 0's and 1's.

Terms

a(0) =9a(1) =83a(2) =84a(3) =85a(4) =86a(5) =87a(6) =88a(7) =89a(8) =99a(9) =108a(10) =117a(11) =126a(12) =135a(13) =144a(14) =153a(15) =163a(16) =171a(17) =244a(18) =252a(19) =325a(20) =333a(21) =406a(22) =414a(23) =487a(24) =495a(25) =568a(26) =576a(27) =649a(28) =657a(29) =730