Numbers whose ternary expansion contains no 1's.

Terms

a(0) =0a(1) =2a(2) =6a(3) =8a(4) =18a(5) =20a(6) =24a(7) =26a(8) =54a(9) =56a(10) =60a(11) =62a(12) =72a(13) =74a(14) =78a(15) =80a(16) =162a(17) =164a(18) =168a(19) =170a(20) =180a(21) =182a(22) =186a(23) =188a(24) =216a(25) =218a(26) =222a(27) =224a(28) =234a(29) =236