%I A053888
%S A053888 1,3,11,173,3161,34827,43923,44623,54123,1108661,9603239,14832161,
%T A053888 9960980373,1513668461761
%N A053888 Numbers n such that n^2 contains only digits {1,2,9}.
%H A053888 Author?, <a href="http://blue.kakiko.com/mmrmmr/htm/eqtn06.html">Source</
               a>(<a href="http://blue.kakiko.com/mmrmmr/txt/eqtn06.txt">txt</a>
               )
%H A053888 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 A053888 Cf. A053889.
%Y A053888 Sequence in context: A140538 A006485 A003115 this_sequence A118479 A103836 
               A081484
%Y A053888 Adjacent sequences: A053885 A053886 A053887 this_sequence A053889 A053890 
               A053891
%K A053888 nonn,base,more
%O A053888 1,2
%A A053888 Patrick De Geest (pdg(AT)worldofnumbers.com), Mar 15 2000.
%E A053888 More terms from C. Ronaldo (aga_new_ac(AT)hotmail.com), Jan 04 2005
%E A053888 One more term from Jon E. Schoenfield (jonscho(AT)hiwaay.net), Sep 03 
               2006