Numbers whose base-9 representation has the same nonzero number of 1's and 5's.

Terms

a(0) =14a(1) =46a(2) =86a(3) =104a(4) =113a(5) =122a(6) =126a(7) =128a(8) =129a(9) =130a(10) =132a(11) =133a(12) =134a(13) =140a(14) =149a(15) =158a(16) =176a(17) =208a(18) =257a(19) =289a(20) =338a(21) =370a(22) =406a(23) =414a(24) =416a(25) =417a(26) =418a(27) =420a(28) =421a(29) =422