A053887 Squares composed of digits {1,2,8}.

1, 81, 121, 8281, 11881, 128881, 11282881, 228281881, 1112822881, 111128222881, 11111282222881, 222128888112121, 228828882122281, 812121128112121, 1111112822222881, 8181222218111881, 111111128222222881

Offset

1,2

Links

Zhao Hui Du, Table of n, a(n) for n = 1..44

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

Mathematica

Table[Select[FromDigits/@Tuples[{1, 2, 8}, n], IntegerQ[Sqrt[#]]&], {n, 18}]//Flatten (* Harvey P. Dale, Jun 03 2022 *)

Crossrefs

Cf. A053886.

Sequence in context: A280587 A273372 A366079 * A119943 A001245 A186463

Adjacent sequences: A053884 A053885 A053886 * A053888 A053889 A053890

Keyword

nonn,base

Author

Patrick De Geest, Mar 15 2000

Status

approved