login
Numbers k such that k and k^2 use only the digits 1, 4, 6, 8 and 9.
1

%I #7 Apr 12 2024 09:51:27

%S 1,4,8,9,14,41,119,141,441,446,696,946,1191,4119,6441,9469,9486,41191,

%T 44119,66969,69641,81619,98446,98488,118941,119114,441191,644196,

%U 646886,664191,664446,666946,681881,816691,818196,944191,998446,1191141,6414164,6414191,6441191,6664191,6666946,6681691,6844114,6844119,8166691,8184864,9441881

%N Numbers k such that k and k^2 use only the digits 1, 4, 6, 8 and 9.

%C Generated with DrScheme.

%H Jonathan Wellons, <a href="/A137055/b137055.txt">Table of n, a(n) for n = 1..409</a>

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

%e 646849819868941^2 = 418414689464481418898416461481.

%K base,nonn

%O 1,2

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