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%I #7 Apr 12 2024 09:51:26
%S 0,1,2,10,11,12,20,21,100,101,102,110,120,200,201,210,1000,1001,1002,
%T 1010,1011,1012,1020,1021,1100,1101,1102,1200,1201,2000,2001,2010,
%U 2011,2100,2101,10000,10001,10002,10010,10011,10012,10020,10021,10100,10110,10120,10200,10210,11000,11001,11002,11010,11011,11020,12000,12001,12010,20000,20001
%N Numbers k such that k and k^2 use only the digits 0, 1, 2 and 4.
%C Generated with DrScheme.
%C Subsequence of A136817-A136821. - M. F. Hasler, Jan 24 2008
%H Jonathan Wellons, <a href="/A136816/b136816.txt">Table of n, a(n) for n = 1..1569</a>
%H J. Wellons, <a href="https://web.archive.org/web/20090206165028/http://jonathanwellons.com/shared-digits/">Tables of Shared Digits</a> [archived]
%e 21010001010^2 = 441420142440201020100.
%K base,nonn,changed
%O 1,3
%A Jonathan Wellons (wellons(AT)gmail.com), Jan 22 2008
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