A136918 - OEIS

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

%S 0,5,50,500,505,2255,5000,5005,5050,22550,50000,50005,50050,50500,

%T 50555,225500,225505,500000,500005,500050,500500,500505,505000,505550,

%U 505555,508805,2255000,2255050,5000000,5000005,5000050,5000500,5000505,5002255,5005000,5005050,5005555,5050000,5050005,5052255,5055500,5055550,5088050,22550000

%N Numbers k such that k and k^2 use only the digits 0, 2, 5 and 8.

%C Generated with DrScheme.

%H Jonathan Wellons, <a href="/A136918/b136918.txt">Table of n, a(n) for n = 1..860</a>

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

%e 505000500500005^2 = 255025505505255550255005000025.

%K base,nonn

%O 1,2

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