Numbers whose base-3 representation contains exactly three 0's and no 1's.

Terms

a(0) =54a(1) =164a(2) =168a(3) =180a(4) =216a(5) =494a(6) =506a(7) =510a(8) =542a(9) =546a(10) =558a(11) =650a(12) =654a(13) =666a(14) =702a(15) =1484a(16) =1520a(17) =1532a(18) =1536a(19) =1628a(20) =1640a(21) =1644a(22) =1676a(23) =1680a(24) =1692a(25) =1952a(26) =1964a(27) =1968a(28) =2000a(29) =2004