%I A053890
%S A053890 1,2,12,21,38,1188,20771,37962,3378512,11594538,65833989271,
%T A053890 3798830532038
%N A053890 Numbers n such that n^2 contains only digits {1,3,4}.
%H A053890 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 A053890 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 A053890 Cf. A053891.
%Y A053890 Sequence in context: A073041 A053898 A058413 this_sequence A053896 A155890 
               A077410
%Y A053890 Adjacent sequences: A053887 A053888 A053889 this_sequence A053891 A053892 
               A053893
%K A053890 nonn,base,more
%O A053890 1,2
%A A053890 Patrick De Geest (pdg(AT)worldofnumbers.com), Mar 15 2000.
%E A053890 More terms from C. Ronaldo (aga_new_ac(AT)hotmail.com), Jan 04 2005
%E A053890 One more term from Jon E. Schoenfield (jonscho(AT)hiwaay.net), Sep 03 
               2006