A172541 - OEIS

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A172541

Number of n X n 0..1 arrays with row sums 7 and column sums 7.

%I #11 Mar 09 2017 06:30:48

%S 0,0,0,0,0,0,1,40320,14398171200,8302816499443200,

%T 7722015017013984456000,11649337108041078980732943360,

%U 28278447454165011203551734584421120,108738182111446498614705217754614976371200

%N Number of n X n 0..1 arrays with row sums 7 and column sums 7.

%H R. H. Hardin, <a href="/A172541/b172541.txt">Table of n, a(n) for n=1..23</a>

%Y Column 7 of A008300, Cf. A075754.

%K nonn

%O 1,8

%A _R. H. Hardin_, Feb 06 2010