Numbers whose base-12 representation has the same nonzero number of 1's and 6's.

Terms

a(0) =18a(1) =73a(2) =150a(3) =174a(4) =186a(5) =198a(6) =210a(7) =216a(8) =218a(9) =219a(10) =220a(11) =221a(12) =223a(13) =224a(14) =225a(15) =226a(16) =227a(17) =234a(18) =246a(19) =258a(20) =270a(21) =282a(22) =306a(23) =361a(24) =450a(25) =505a(26) =594a(27) =649a(28) =738a(29) =793