Numbers whose ternary expansion contains no 0.

Terms

a(0) =1a(1) =2a(2) =4a(3) =5a(4) =7a(5) =8a(6) =13a(7) =14a(8) =16a(9) =17a(10) =22a(11) =23a(12) =25a(13) =26a(14) =40a(15) =41a(16) =43a(17) =44a(18) =49a(19) =50a(20) =52a(21) =53a(22) =67a(23) =68a(24) =70a(25) =71a(26) =76a(27) =77a(28) =79a(29) =80