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A172723 Number of n X n 0..3 arrays with row sums 4 and column sums 4 1

%I

%S 0,3,87,8515,1992760,971853075,887226868605,1397573379100570,

%T 3564687080800036800,13994422270858878448950,

%U 81142871841524279822631750,671520101271652710399345719850,7707138964962257026620598104320400

%N Number of n X n 0..3 arrays with row sums 4 and column sums 4

%H R. H. Hardin, <a href="/A172723/b172723.txt">Table of n, a(n) for n=1..55</a>

%K nonn

%O 1,2

%A _R. H. Hardin_ Feb 06 2010

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Last modified January 25 16:01 EST 2022. Contains 350572 sequences. (Running on oeis4.)