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Numbers k such that k and k^2 use only the digits 0, 3, 4, 6 and 8.
1

%I #9 Apr 12 2024 09:51:26

%S 0,6,8,60,80,600,800,6000,6638,6808,6844,8000,60000,60406,60688,66380,

%T 66808,68080,68440,80000,600000,604060,606880,663800,668080,680800,

%U 684400,800000,6000000,6003406,6004006,6040600,6068800,6638000,6680800,6808000,6844000,8000000,60000000,60034060,60040060,60406000,60688000,66363008,66380000

%N Numbers k such that k and k^2 use only the digits 0, 3, 4, 6 and 8.

%C Generated with DrScheme.

%H Jonathan Wellons, <a href="/A136931/b136931.txt">Table of n, a(n) for n = 1..378</a>

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

%e 683084686436344^2 = 466604688843838404646364086336.

%Y See also A058429-A058430. - _M. F. Hasler_, Jan 24 2008

%K base,nonn

%O 1,2

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