Automorphic numbers: n^2 ends with n in base 6 (written in base 6).

Terms

a(0) =0a(1) =1a(2) =3a(3) =4a(4) =13a(5) =44a(6) =213a(7) =344a(8) =5344a(9) =50213a(10) =205344a(11) =350213a(12) =1350213a(13) =4205344a(14) =21350213a(15) =34205344a(16) =221350213a(17) =334205344a(18) =2221350213a(19) =3334205344a(20) =52221350213a(21) =152221350213a(22) =403334205344