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%I #9 Apr 12 2024 09:51:27
%S 2,5,24,25,26,65,74,75,76,275,474,475,476,524,525,526,665,674,675,725,
%T 2574,2725,2765,4762,6524,6525,6665,6674,6675,6725,6742,6762,6765,
%U 7242,7465,7525,27525,47725,52465,52675,66524,66525,66665,66674,66675,66725,66765,67426,67574,72426,72475,72576,74475,74476,75674,254275,254475,255475,256266
%N Numbers k such that k and k^2 use only the digits 2, 4, 5, 6 and 7.
%C Generated with DrScheme.
%H Jonathan Wellons, <a href="/A137094/b137094.txt">Table of n, a(n) for n = 1..837</a>
%H J. Wellons, <a href="https://web.archive.org/web/20090206165028/http://jonathanwellons.com/shared-digits/">Tables of Shared Digits</a> [archived]
%e 752745425474262^2 = 566625675572427726727624444644.
%t Module[{c={2,4,5,6,7},nn=6},Select[Flatten[Table[FromDigits/@Tuples[c,n],{n,nn}]],SubsetQ[c,IntegerDigits[#^2]]&]] (* _Harvey P. Dale_, Oct 03 2019 *)
%K base,nonn,changed
%O 1,1
%A Jonathan Wellons (wellons(AT)gmail.com), Jan 22 2008
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