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%I #8 May 10 2024 11:28:16
%S 74,76,74476,74474476
%N Numbers k such that k and k^2 use only the digits 4, 5, 6 and 7.
%C Generated with DrScheme.
%H Jonathan Wellons, <a href="https://web.archive.org/web/20090206165028/http://jonathanwellons.com/shared-digits/">Tables of Shared Digits</a> [archived]
%e 74474476^2 = 5546447575474576.
%K base,nonn,more
%O 1,1
%A Jonathan Wellons (wellons(AT)gmail.com), Jan 22 2008