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Numbers k such that k and k^2 use only the digits 0, 1, 3, 4 and 5.
1

%I #7 Apr 12 2024 09:51:26

%S 0,1,10,100,1000,10000,100000,100501,550501,551501,1000000,1005010,

%T 5505010,5515010,10000000,10005001,10050100,10055001,55050100,

%U 55055001,55150100,100000000,100050010,100501000,100550010,550501000,550550010,551501000,1000000000,1000050001,1000050501,1000500100,1000501451,1000550001,1000550501

%N Numbers k such that k and k^2 use only the digits 0, 1, 3, 4 and 5.

%C Generated with DrScheme.

%H Jonathan Wellons, <a href="/A136837/b136837.txt">Table of n, a(n) for n = 1..282</a>

%H J. Wellons, <a href="https://web.archive.org/web/20090206165028/http://jonathanwellons.com/shared-digits/">Tables of Shared Digits</a> [archived]

%e 10151031501451^2 = 103043440543450543415105401.

%K base,nonn

%O 1,3

%A Jonathan Wellons (wellons(AT)gmail.com), Jan 22 2008