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

%I #5 Apr 12 2024 09:51:26

%S 0,1,10,100,1000,10000,100000,1000000,1077776,10000000,10777760,

%T 100000000,107777600,1000000000,1077776000,10000000000,10777760000,

%U 100000000000,107777600000,1000000000000,1077776000000,10000000000000,10777760000000,100000000000000,107777600000000

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

%C Generated with DrScheme.

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

%e 107777600000000^2 = 11616011061760000000000000000.

%K base,nonn

%O 1,3

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