|
%I #7 Apr 12 2024 09:51:26
%S 0,2,7,20,27,47,70,97,200,270,470,497,700,970,997,2000,2700,4700,4970,
%T 4997,7000,9700,9970,9997,20000,22247,27000,44747,44777,47000,49700,
%U 49777,49970,49997,70000,97000,99700,99970,99997,200000,222470,270000,447470,447770,470000,497000,497770,499297,499700,499777,499970,499997,700000,704997,970000
%N Numbers k such that k and k^2 use only the digits 0, 2, 4, 7 and 9.
%C Generated with DrScheme.
%H Jonathan Wellons, <a href="/A136907/b136907.txt">Table of n, a(n) for n = 1..1038</a>
%H J. Wellons, <a href="https://web.archive.org/web/20090206165028/http://jonathanwellons.com/shared-digits/">Tables of Shared Digits</a> [archived]
%e 949092947094747^2 = 900777422224992227907794994009.
%K base,nonn,changed
%O 1,2
%A Jonathan Wellons (wellons(AT)gmail.com), Jan 22 2008
|
