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%I #12 Dec 13 2023 14:47:15
%S 1,6,36,2442,4756140,255657603186,394912380135575238,
%T 18212451695911558370419098,25800579898930843398657192741983084,
%U 1146703506910134603350506378410721970397210150
%N Number of n X n 0..5 matrices with all row and column sums equal.
%e Some solutions for n=3
%e ..3..0..2....5..1..3....4..3..2....3..2..4....0..2..2....0..5..3....5..4..1
%e ..2..0..3....1..4..4....0..4..5....5..4..0....0..2..2....3..3..2....2..3..5
%e ..0..5..0....3..4..2....5..2..2....1..3..5....4..0..0....5..0..3....3..3..4
%Y Column 5 of A202784.
%K nonn,more
%O 0,2
%A _R. H. Hardin_, Feb 20 2002
%E a(0)=1 prepended and a(6)-a(7) from _Andrew Howroyd_, May 11 2020
%E a(8)-a(9) from _Sean A. Irvine_, Dec 13 2023
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