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Numbers k such that k and k^2 use only the digits 0, 1, 3, 6 and 8.
2

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

%S 0,1,6,10,60,100,600,1000,6000,8131,10000,10301,10631,10801,31801,

%T 60000,60306,81310,100000,103010,103131,106310,108010,116881,136631,

%U 318010,600000,603060,813100,1000000,1003001,1008001,1030100,1031310,1063100,1080100,1080801,1086881,1168810,1366310,1366881,3168381,3180100,6000000,6003006

%N Numbers k such that k and k^2 use only the digits 0, 1, 3, 6 and 8.

%C Generated with DrScheme.

%H Jonathan Wellons, <a href="/A136849/b136849.txt">Table of n, a(n) for n = 1..655</a>

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

%e 813131601668131^2 = 661183001631380060861861033161.

%K base,nonn

%O 1,3

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