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

Terms

a(0) =9a(1) =28a(2) =30a(3) =36a(4) =54a(5) =83a(6) =85a(7) =87a(8) =91a(9) =93a(10) =99a(11) =109a(12) =111a(13) =117a(14) =135a(15) =163a(16) =165a(17) =171a(18) =189a(19) =248a(20) =250a(21) =254a(22) =256a(23) =258a(24) =262a(25) =264a(26) =272a(27) =274a(28) =276a(29) =280