Numbers whose base-4 representation has 2 fewer 0's than 3's.

Terms

a(0) =15a(1) =31a(2) =47a(3) =55a(4) =59a(5) =61a(6) =62a(7) =95a(8) =111a(9) =119a(10) =123a(11) =125a(12) =126a(13) =159a(14) =175a(15) =183a(16) =187a(17) =189a(18) =190a(19) =207a(20) =215a(21) =219a(22) =221a(23) =222a(24) =231a(25) =235a(26) =237a(27) =238a(28) =243a(29) =245