A137124 Numbers k such that k and k^2 use only the digits 3, 4, 5, 7 and 8.

88, 588, 888, 7378, 7588, 8588, 74388, 88588, 738538, 743878, 745478, 747378, 758588, 5878388, 7338588, 7448878, 7573538, 8878878, 57843538, 73385888, 73877438, 73883588, 75745478, 75784878, 88534388, 578573538, 733878388, 757544438, 7384753588, 7575344438, 7587775588, 8575883388, 57773588588, 73738374388, 74534384538

Offset

1,1

Comments

Generated with DrScheme.

Links

Jonathan Wellons, Table of n, a(n) for n = 1..80

J. Wellons, Tables of Shared Digits [archived]

Example

857585875778388^2 = 735453534334584733744887878544.

Mathematica

With[{c={3, 4, 5, 7, 8}}, Table[Select[FromDigits/@Tuples[c, n], SubsetQ[c, IntegerDigits[#^2]]&], {n, 9}]]//Flatten (* The program generates the first 28 terms of the sequence. *) (* Harvey P. Dale, Apr 03 2025 *)

Crossrefs

Sequence in context: A236003 A183839 A297228 * A194651 A072432 A136951

Adjacent sequences: A137121 A137122 A137123 * A137125 A137126 A137127

Keyword

base,nonn

Author

Jonathan Wellons (wellons(AT)gmail.com), Jan 22 2008

Status

approved