Numbers whose base-9 representation has the same nonzero number of 1's and 8's.

Terms

a(0) =17a(1) =73a(2) =89a(3) =107a(4) =116a(5) =125a(6) =134a(7) =143a(8) =152a(9) =153a(10) =155a(11) =156a(12) =157a(13) =158a(14) =159a(15) =160a(16) =179a(17) =235a(18) =260a(19) =316a(20) =341a(21) =397a(22) =422a(23) =478a(24) =503a(25) =559a(26) =584a(27) =640a(28) =649a(29) =657