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Numbers k such that k and k^2 use only the digits 2, 3, 5, 6 and 8.
1

%I #8 Apr 12 2024 09:51:27

%S 5,6,25,235,256,535,2385,2585,2885,5325,23566,23585,56865,62335,

%T 228656,235335,235635,256585,288656,535335,623585,828665,2286665,

%U 2353365,2362885,2363335,2363385,2523566,2526335,2556635,2562535,2585666,2885885,5355635,5368665,22865525,23533665,23566635,23633385,25265365,25565335,25566635

%N Numbers k such that k and k^2 use only the digits 2, 3, 5, 6 and 8.

%C Generated with DrScheme.

%H Jonathan Wellons, <a href="/A137081/b137081.txt">Table of n, a(n) for n = 1..293</a>

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

%e 256252538685635^2 = 65665363582832862253355353225.

%K base,nonn

%O 1,1

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