%I A018885
%S A018885 1,4,9,16,25,36,49,64,81,100,121,144,225,400,441,484,676,900,1444,7744,
%T A018885 10000,11881,29929,40000,44944,55225,69696,90000,1000000,4000000,9000000,
%U A018885 9696996,100000000,400000000,900000000,6661661161,10000000000
%N A018885 Squares using only two distinct digits.
%H A018885 Alexandru Gica and Laurentiu Panaitopol, <a href="http://www.cs.uwaterloo.ca/
               journals/JIS/index.html">On Oblath's Problem</a>, J. Integer Seqs., 
               Vol. 6, 2003.
%H A018885 Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/
               SquareNumber.html">See also</a>
%Y A018885 Cf. A016069, A016070, A018884.
%Y A018885 Sequence in context: A000290 A162395 A144913 this_sequence A025741 A030476 
               A077355
%Y A018885 Adjacent sequences: A018882 A018883 A018884 this_sequence A018886 A018887 
               A018888
%K A018885 nonn,base
%O A018885 1,2
%A A018885 David W. Wilson (davidwwilson(AT)comcast.net)