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

Terms

a(0) =162a(1) =488a(2) =492a(3) =504a(4) =540a(5) =648a(6) =1466a(7) =1478a(8) =1482a(9) =1514a(10) =1518a(11) =1530a(12) =1622a(13) =1626a(14) =1638a(15) =1674a(16) =1946a(17) =1950a(18) =1962a(19) =1998a(20) =2106a(21) =4400a(22) =4436a(23) =4448a(24) =4452a(25) =4544a(26) =4556a(27) =4560a(28) =4592a(29) =4596