Squares whose base-3 expansion has no 0.

Terms

a(0) =1a(1) =4a(2) =16a(3) =25a(4) =49a(5) =121a(6) =400a(7) =484a(8) =1444a(9) =1849a(10) =3364a(11) =5476a(12) =10201a(13) =10609a(14) =10816a(15) =12769a(16) =17161a(17) =19321a(18) =19600a(19) =155236a(20) =169744a(21) =274576a(22) =286225a(23) =344569a(24) =346921a(25) =450241a(26) =502681a(27) =863041a(28) =885481a(29) =984064