%I A053906
%S A053906 1,4,26,131,276,881,3431,81346,81619,129119,132954,1292931424
%N A053906 Numbers n such that n^2 contains only digits {1,6,7}.
%H A053906 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 A053906 Cf. A053907.
%Y A053906 Sequence in context: A140804 A147621 A058408 this_sequence A100236 A144068 
               A121767
%Y A053906 Adjacent sequences: A053903 A053904 A053905 this_sequence A053907 A053908 
               A053909
%K A053906 nonn,base,more
%O A053906 1,2
%A A053906 Patrick De Geest (pdg(AT)worldofnumbers.com), Mar 15 2000.
%E A053906 More terms from C. Ronaldo (aga_new_ac(AT)hotmail.com), Jan 04 2005