A136920 - OEIS

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

%S 0,5,50,95,500,505,950,995,5000,5005,5050,5095,9500,9950,9995,50000,

%T 50005,50050,50095,50500,50950,95000,95005,99500,99950,99995,500000,

%U 500005,500050,500095,500500,500505,500950,500995,502005,505000,509500,950000,950005,950050,995000,999500,999950,999995,5000000,5000005,5000050,5000095,5000500

%N Numbers k such that k and k^2 use only the digits 0, 2, 5 and 9.

%C Generated with DrScheme.

%H Jonathan Wellons, <a href="/A136920/b136920.txt">Table of n, a(n) for n = 1..1172</a>

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

%e 95005050000095^2 = 9025959525520550959500009025.

%K base,nonn

%O 1,2

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