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

Terms

a(0) =27a(1) =82a(2) =84a(3) =90a(4) =108a(5) =162a(6) =245a(7) =247a(8) =249a(9) =253a(10) =255a(11) =261a(12) =271a(13) =273a(14) =279a(15) =297a(16) =325a(17) =327a(18) =333a(19) =351a(20) =405a(21) =487a(22) =489a(23) =495a(24) =513a(25) =567a(26) =734a(27) =736a(28) =740a(29) =742