login
Numbers k such that k and k^2 use only the digits 1, 5, 6, 7 and 9.
1

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

%S 1,76,719,9569,9576,9796,719666,756169,759576,956619,957166,957576,

%T 995576,7177166,7179966,7717966,75577716,97956969,99795669,99957576,

%U 975559796,977576169,995799576,997995576,7177576169,7517976169,7691917576,7719565766,9579956669,9957999576,9999759796,71777197716,76155511669,76155759576

%N Numbers k such that k and k^2 use only the digits 1, 5, 6, 7 and 9.

%C Generated with DrScheme.

%H Jonathan Wellons, <a href="/A137061/b137061.txt">Table of n, a(n) for n = 1..109</a>

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

%e 995976796797976^2 = 991969779759956776166557696576.

%K base,nonn

%O 1,2

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