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%I #5 Oct 27 2019 21:44:29
%S 1,568504,23041655136,64008728200384,20331541618406216,
%T 1051966701961097184,13952451706754445456
%N Number of 13 X 13 arrays of squares of integers, symmetric about main diagonal, with all rows summing to n.
%K nonn
%O 0,2
%A _R. H. Hardin_, Feb 09 2009
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