Squares composed of digits {1,3,6}.

Terms

a(0) =1a(1) =16a(2) =36a(3) =361a(4) =3136a(5) =136161a(6) =633616a(7) =1313316a(8) =1336336a(9) =13366336a(10) =66113161a(11) =363131136a(12) =1616361616a(13) =6661661161a(14) =66631613161