Numbers with exactly two distinct base-8 digits.

Terms

a(0) =8a(1) =10a(2) =11a(3) =12a(4) =13a(5) =14a(6) =15a(7) =16a(8) =17a(9) =19a(10) =20a(11) =21a(12) =22a(13) =23a(14) =24a(15) =25a(16) =26a(17) =28a(18) =29a(19) =30a(20) =31a(21) =32a(22) =33a(23) =34a(24) =35a(25) =37a(26) =38a(27) =39a(28) =40a(29) =41