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Number of n X n 0..9 arrays with row sums n and column sums n.
1

%I #6 Apr 26 2015 17:22:22

%S 1,3,55,10147,22069251,602351808741,215717608046511873,

%T 1046591482728407939338275,70417932475495769964322670258947,

%U 66879971495995556019851723767661130580273

%N Number of n X n 0..9 arrays with row sums n and column sums n.

%H R. H. Hardin, <a href="/A172962/b172962.txt">Table of n, a(n) for n=1..11</a>

%K nonn

%O 1,2

%A _R. H. Hardin_, Feb 06 2010