Numbers whose base-6 representation has the same nonzero number of 1's and 2's.

Terms

a(0) =8a(1) =13a(2) =38a(3) =48a(4) =51a(5) =52a(6) =53a(7) =56a(8) =62a(9) =68a(10) =73a(11) =78a(12) =81a(13) =82a(14) =83a(15) =91a(16) =97a(17) =103a(18) =116a(19) =121a(20) =152a(21) =157a(22) =188a(23) =193a(24) =218a(25) =228a(26) =231a(27) =232a(28) =233a(29) =236