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%I #6 Oct 15 2023 18:55:22
%S 1,19,5881,115321795,101471705778601,5520471267708881730181,
%T 17949532724881770551236183389177,
%U 3781994369388530584295658367829503216546371
%N Number of 2*n X n 0..2 arrays with row sums n and column sums 2*n.
%H R. H. Hardin, <a href="/A172662/b172662.txt">Table of n, a(n) for n=1..10</a>
%K nonn
%O 1,2
%A _R. H. Hardin_, Feb 06 2010