%I A159407
%S A159407 28,7182,3923136,2168352600,1094602264164,437181997913808,
%T A159407 123598365410489088,22732655012770729752,2620728473996336526900,
%U A159407 193309311936589609598244,9610726322148658419480768
%N A159407 Number of nXn arrays of squares of integers summing to 21
%H A159407 R. H. Hardin, <a href="b159407.txt">Table of n, a(n) for n=2..100</a>
%Y A159407 Sequence in context: A164655 A036525 A131315 this_sequence A099058 A159415 
               A134772
%Y A159407 Adjacent sequences: A159404 A159405 A159406 this_sequence A159408 A159409 
               A159410
%K A159407 nonn
%O A159407 2,1
%A A159407 Ron Hardin (rhhardin(AT)att.net) Apr 11 2009