%I #8 Apr 12 2024 09:51:27
%S 2,3,7,27,223,473,4943,49777,222327,273393,477277,499423,499473,
%T 973393,2733943,4932923,4993443,4994777,4997927,49342927,49924277,
%U 49972927,49993443,49994223,49994777,97339223,492942927,494342927,497332327,497794473,497993923,499293443,499932923,499947327,499972927,499979277,499979327
%N Numbers k such that k and k^2 use only the digits 2, 3, 4, 7 and 9.
%C Generated with DrScheme.
%H Jonathan Wellons, <a href="/A137075/b137075.txt">Table of n, a(n) for n = 1..200</a>
%H J. Wellons, <a href="https://web.archive.org/web/20090206165028/http://jonathanwellons.com/shared-digits/">Tables of Shared Digits</a> [archived]
%e 497242372972927^2 = 247249977479747443472274947329.
%K base,nonn
%O 1,1
%A Jonathan Wellons (wellons(AT)gmail.com), Jan 22 2008