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%I #5 Oct 27 2019 18:19:21
%S 1,1680,1756860,449345680,33899743010,896812758240,10075020851140,
%T 65214945341280,366766557522330,2033591738777760,9808527088125024,
%U 42048089482202384
%N Number of 16 X 16 arrays of squares of integers, symmetric under 90-degree rotation, with all rows summing to n.
%K nonn
%O 0,2
%A _R. H. Hardin_, Feb 09 2009
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