A136826 - OEIS

A136826

Numbers k such that k and k^2 use only the digits 0, 1, 2, 5 and 9.

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

%S 0,1,5,10,11,15,50,95,100,101,105,110,150,500,501,505,950,955,995,

%T 1000,1001,1005,1010,1011,1050,1095,1100,1101,1105,1500,1515,5000,

%U 5001,5005,5010,5011,5015,5050,5095,9500,9550,9950,9955,9995,10000,10001,10005,10010,10011,10050,10095,10100,10105,10110,10500,10950,10955,11000,11001,11005,11010

%N Numbers k such that k and k^2 use only the digits 0, 1, 2, 5 and 9.

%C Generated with DrScheme.

%H Jonathan Wellons, <a href="/A136826/b136826.txt">Table of n, a(n) for n = 1..1274</a>

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

%e 502902501^2 = 252910925512055001.

%K base,nonn

%O 1,3

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