%I A137020
%S A137020 1,9,11,91,911
%N A137020 Numbers n such that n and the square of n use only the digits 1, 2, 8 
               and 9.
%C A137020 Generated with DrScheme
%H A137020 J. Wellons, <a href="http://jonathanwellons.com/shared-digits/">Tables 
               of Shared Digits</a>
%e A137020 911^2 = 829921
%Y A137020 Sequence in context: A038301 A137016 A053886 this_sequence A058304 A027727 
               A019328
%Y A137020 Adjacent sequences: A137017 A137018 A137019 this_sequence A137021 A137022 
               A137023
%K A137020 base,nonn
%O A137020 1,2
%A A137020 Jonathan Wellons (wellons(AT)gmail.com), Jan 22 2008