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A137015 Numbers k such that k and k^2 use only the digits 1, 2, 6, 7 and 9. 1

%I

%S 1,11,26,27,96,127,276,277,1296,1619,2777,9627,12719,16161,16176,

%T 16619,27796,96296,126969,127161,129119,161761,161777,266777,267619,

%U 269777,1269761,1272777,1617619,1617627,2629119,2667619,2696627,7912719,7917777,11266176,12719777,26769627,27621911,79226969,166621176,166726161,167116119

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

%C Generated with DrScheme.

%H Jonathan Wellons, <a href="/A137015/b137015.txt">Table of n, a(n) for n = 1..198</a>

%H J. Wellons, <a href="http://jonathanwellons.com/shared-digits/">Tables of Shared Digits</a>

%e 161761916926161^2 = 26166917767626212626726197921.

%K base,nonn

%O 1,2

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

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Last modified September 19 16:24 EDT 2021. Contains 347564 sequences. (Running on oeis4.)