Numbers whose base-12 representation has the same nonzero number of 3's and 6's.

Terms

a(0) =42a(1) =75a(2) =186a(3) =219a(4) =330a(5) =363a(6) =438a(7) =450a(8) =462a(9) =486a(10) =498a(11) =504a(12) =505a(13) =506a(14) =508a(15) =509a(16) =511a(17) =512a(18) =513a(19) =514a(20) =515a(21) =522a(22) =534a(23) =546a(24) =558a(25) =570a(26) =618a(27) =651a(28) =762a(29) =795