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%I #5 Dec 18 2015 18:17:20
%S 80,81970,198598120,364613564592,491411402965408,433784038380001756,
%T 230474677737192144368,70203649179688320074704,
%U 12227440515845132316709008,1273365210975360016227907628
%N Number of n X n arrays of squares of integers with every (n-1)X(n-1) subblock summing to 21
%H R. H. Hardin, <a href="/A159408/b159408.txt">Table of n, a(n) for n=3..16</a>
%K nonn
%O 3,1
%A _R. H. Hardin_ Apr 11 2009
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