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%I #4 Mar 31 2012 12:35:40
%S 0,1,21,2371,628080,342829125,344827336455,589985590963930,
%T 1614966163545077280,6736902064011471514050,
%U 41169485539316907099731250,356683733303639928299266819050,4261817244676586430350506540348800
%N Number of n X n 0..2 arrays with row sums 4 and column sums 4
%H R. H. Hardin, <a href="/A172622/b172622.txt">Table of n, a(n) for n=1..56</a>
%K nonn
%O 1,3
%A _R. H. Hardin_ Feb 06 2010