%I A053912
%S A053912 1,9,109,280859,105769141,279067891
%N A053912 Numbers n such that n^2 contains only digits {1,7,8}.
%H A053912 P. De Geest, <a href="http://www.worldofnumbers.com/threedigits.htm">
               Squares containing at most three distinct digits, Index entries for 
               related sequences</a>
%Y A053912 Cf. A053913.
%Y A053912 Sequence in context: A058421 A128876 A105974 this_sequence A053894 A053904 
               A058607
%Y A053912 Adjacent sequences: A053909 A053910 A053911 this_sequence A053913 A053914 
               A053915
%K A053912 nonn,base,more
%O A053912 1,2
%A A053912 Patrick De Geest (pdg(AT)worldofnumbers.com), Mar 15 2000.