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Numbers k such that k and k^2 use only the digits 1, 2, 6 and 7.
0

%I #9 May 10 2024 09:26:05

%S 1,11,26,276,161761

%N Numbers k such that k and k^2 use only the digits 1, 2, 6 and 7.

%C Generated with DrScheme.

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

%e 161761^2 = 26166621121.

%K base,nonn,more

%O 1,2

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