Numbers n not divisible by 3 such that n^2 written in base 3 has no digit > 1.

Terms

a(0) =1a(1) =2a(2) =11a(3) =16a(4) =19a(5) =29a(6) =55a(7) =83a(8) =143a(9) =163a(10) =245a(11) =262a(12) =421a(13) =451a(14) =487a(15) =731a(16) =889a(17) =1331a(18) =1342a(19) =1459a(20) =1487a(21) =2189a(22) =2242a(23) =2323a(24) =2537a(25) =2573a(26) =2644a(27) =2662a(28) =3788a(29) =4375