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Numbers k such that k and k^2 use only the digits 3, 4, 6, 8 and 9.
1

%I #7 Apr 12 2024 09:51:27

%S 3,6,8,63,83,93,94,683,833,836,6633,6833,6963,8333,8336,9843,9933,

%T 66833,68333,69883,83333,83336,83664,94836,96643,96886,98336,99694,

%U 666333,666963,668333,669843,683333,696344,699633,833333,833336,939864,939938,948664,948683,966643,983336,994836,996688,999333,6668333,6683333,6683438,6833333

%N Numbers k such that k and k^2 use only the digits 3, 4, 6, 8 and 9.

%C Generated with DrScheme.

%H Jonathan Wellons, <a href="/A137129/b137129.txt">Table of n, a(n) for n = 1..487</a>

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

%e 834843634694364^2 = 696963894389696686639693364496.

%K base,nonn

%O 1,1

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