Numbers with exactly three distinct base-8 digits.

Terms

a(0) =66a(1) =67a(2) =68a(3) =69a(4) =70a(5) =71a(6) =80a(7) =83a(8) =84a(9) =85a(10) =86a(11) =87a(12) =88a(13) =90a(14) =92a(15) =93a(16) =94a(17) =95a(18) =96a(19) =98a(20) =99a(21) =101a(22) =102a(23) =103a(24) =104a(25) =106a(26) =107a(27) =108a(28) =110a(29) =111