%I A137009
%S A137009 1,5,11,15,27,77,227,527,715,1515,1711,2777,7227,7715,22715,52915,71911,
               97527,159911,275527,277977,
%T A137009 715511,727511,977511,2791515,7219777,7557511,7715515,7727711,7727715,
               9591515,9777515,9797511,
%U A137009 9797715,9955511,11292915,12292915,17255515,27771527,27797715,27797977,
               27915515,71971911,72299211
%N A137009 Numbers n such that n and the square of n use only the digits 1, 2, 5, 
               7 and 9.
%C A137009 Generated with DrScheme
%H A137009 Jonathan Wellons, <a href="b137009.txt">Table of n, a(n) for n=1..272</
               a>
%H A137009 J. Wellons, <a href="http://jonathanwellons.com/shared-digits/">Tables 
               of Shared Digits</a>
%e A137009 759722171291527^2 = 577177777551912291775221991729
%Y A137009 Sequence in context: A075628 A036787 A154503 this_sequence A034905 A031153 
               A136976
%Y A137009 Adjacent sequences: A137006 A137007 A137008 this_sequence A137010 A137011 
               A137012
%K A137009 base,nonn
%O A137009 1,2
%A A137009 Jonathan Wellons (wellons(AT)gmail.com), Jan 22 2008