A058468 Squares composed of digits {3,8,9}.

9, 339889, 3383399889, 3398339883988899839889, 39989983893893399999889

Offset

1,1

Links

Table of n, a(n) for n=1..5.

Patrick De Geest, Index to related sequences

Hisanori Mishima, Sporadic tridigital solutions

Mathematica

Select[Flatten[Table[10#+9&/@FromDigits/@Tuples[{3, 8, 9}, n], {n, 0, 10}]], IntegerQ[Sqrt[#]]&] (* The program generates the first three terms of the sequence. *) (* Harvey P. Dale, Jan 28 2024 *)

Crossrefs

Cf. A058467.

Sequence in context: A159344 A120352 A225069 * A133414 A013850 A174001

Adjacent sequences: A058465 A058466 A058467 * A058469 A058470 A058471

Keyword

nonn,base,hard,more

Author

Patrick De Geest, Nov 15 2000

Extensions

a(3) corrected by Sascha Kurz, Jun 12 2021

Status

approved