Numbers whose base-3 representation has the same number of 0's as 2's.

Terms

a(0) =1a(1) =4a(2) =6a(3) =11a(4) =13a(5) =15a(6) =19a(7) =21a(8) =32a(9) =34a(10) =38a(11) =40a(12) =42a(13) =46a(14) =48a(15) =56a(16) =58a(17) =60a(18) =64a(19) =66a(20) =72a(21) =89a(22) =95a(23) =97a(24) =101a(25) =103a(26) =105a(27) =113a(28) =115a(29) =119