login
Numbers k such that k and k^2 use only the digits 0, 2, 3, 4 and 9.
1

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

%S 0,2,3,20,30,200,300,493,2000,3000,4903,4930,4943,4993,20000,30000,

%T 30332,30403,49030,49300,49430,49903,49930,49943,49993,200000,223393,

%U 300000,303320,304030,304943,490300,493000,494300,499003,499030,499300,499423,499430,499903,499930,499943,499993,2000000,2233930,3000000,3003903,3004003

%N Numbers k such that k and k^2 use only the digits 0, 2, 3, 4 and 9.

%C Generated with DrScheme.

%H Jonathan Wellons, <a href="/A136886/b136886.txt">Table of n, a(n) for n = 1..1127</a>

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

%e 49924343204903^2 = 2492440044440944349443239409.

%K base,nonn

%O 1,2

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