Numbers whose base-3 representation contains no 2.

Terms

a(0) =0a(1) =1a(2) =3a(3) =4a(4) =9a(5) =10a(6) =12a(7) =13a(8) =27a(9) =28a(10) =30a(11) =31a(12) =36a(13) =37a(14) =39a(15) =40a(16) =81a(17) =82a(18) =84a(19) =85a(20) =90a(21) =91a(22) =93a(23) =94a(24) =108a(25) =109a(26) =111a(27) =112a(28) =117a(29) =118