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%I #9 Dec 11 2023 01:27:22
%S 13,169,112489,10309971465,121778484808846083,
%T 193842679171307621077398205
%N Number of n X n 0..12 matrices with all row and column sums equal.
%K nonn,more
%O 1,1
%A _R. H. Hardin_, Feb 20 2002
%E a(5)-a(6) from _Sean A. Irvine_, Dec 11 2023
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