Numbers with exactly two distinct base-6 digits.

Terms

a(0) =6a(1) =8a(2) =9a(3) =10a(4) =11a(5) =12a(6) =13a(7) =15a(8) =16a(9) =17a(10) =18a(11) =19a(12) =20a(13) =22a(14) =23a(15) =24a(16) =25a(17) =26a(18) =27a(19) =29a(20) =30a(21) =31a(22) =32a(23) =33a(24) =34a(25) =36a(26) =37a(27) =42a(28) =44a(29) =45