A053893 Squares composed of digits {1,3,6}.

1, 16, 36, 361, 3136, 136161, 633616, 1313316, 1336336, 13366336, 66113161, 363131136, 1616361616, 6661661161, 66631613161, 31633661633161, 613163131661161, 131616316361116161, 1166361161363316361

Offset

1,2

Links

Zhao Hui Du, Table of n, a(n) for n = 1..25

Patrick De Geest, Squares containing at most three distinct digits, Index entries for related sequences

Mathematica

Select[Flatten[Table[FromDigits/@Tuples[{1, 3, 6}, n], {n, 20}]], IntegerQ[ Sqrt[ #]]&] (* Harvey P. Dale, Jul 20 2021 *)

Crossrefs

Cf. A053892.

Sequence in context: A264546 A218523 A300535 * A068833 A116190 A070587

Adjacent sequences: A053890 A053891 A053892 * A053894 A053895 A053896

Keyword

nonn,base

Author

Patrick De Geest, Mar 15 2000

Extensions

More terms from C. Ronaldo (aga_new_ac(AT)hotmail.com), Jan 04 2005

Status

approved