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%I #7 Apr 12 2024 09:51:26
%S 0,3,7,30,70,97,300,700,970,997,3000,7000,9700,9970,9997,30000,70000,
%T 97000,99700,99970,99997,300000,700000,970000,997000,999700,999970,
%U 999997,3000000,3074003,7000000,9700000,9970000,9997000,9999700,9999970,9999997,30000000,30740030,70000000,97000000,99700000,99970000,99997000,99999700,99999970
%N Numbers k such that k and k^2 use only the digits 0, 3, 4, 7 and 9.
%C Generated with DrScheme
%H Jonathan Wellons, <a href="/A136934/b136934.txt">Table of n, a(n) for n = 1..209</a>
%H J. Wellons, <a href="https://web.archive.org/web/20090206165028/http://jonathanwellons.com/shared-digits/">Tables of Shared Digits</a> [archived]
%e 949070307079497^2 = 900734447779970733397477773009.
%K base,nonn
%O 1,2
%A Jonathan Wellons (wellons(AT)gmail.com), Jan 22 2008
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