Numbers whose base-12 representation has the same nonzero number of 1's and 2's.

Terms

a(0) =14a(1) =25a(2) =146a(3) =168a(4) =171a(5) =172a(6) =173a(7) =174a(8) =175a(9) =176a(10) =177a(11) =178a(12) =179a(13) =182a(14) =194a(15) =206a(16) =218a(17) =230a(18) =242a(19) =254a(20) =266a(21) =278a(22) =289a(23) =300a(24) =303a(25) =304a(26) =305a(27) =306a(28) =307a(29) =308