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Numbers k such that k and k^2 use only the digits 0, 3, 6, 7 and 8.
1

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

%S 0,6,60,600,876,6000,8760,8876,60000,87600,88760,600000,876000,887600,

%T 6000000,8760000,8866076,8876000,60000000,60007306,87600000,88660760,

%U 88760000,600000000,600073060,600736076,876000000,886607600,887600000,6000000000,6000730600,6007360760,6083073876,8760000000,8866076000,8876000000

%N Numbers k such that k and k^2 use only the digits 0, 3, 6, 7 and 8.

%C Generated with DrScheme.

%H Jonathan Wellons, <a href="/A136943/b136943.txt">Table of n, a(n) for n = 1..102</a>

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

%e 606703088073876^2 = 368088637078377338663633663376.

%K base,nonn

%O 1,2

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