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\bf
The Integer-Sequence for the Number of Monomer-Dimer Tilings of
an $n$ by $n$ Chessboard Starts With:
1, 7, 131, 10012, 2810694, 2989126727, 11945257052321, 179788343101980135, 
10185111919160666118608,  2172138783673094193937750015, 
\break 1743829823240164494694386437970640, 
5270137993816086266962874395450234534887, 
59956919824257750508655631107474672284499736089,  Thanks to
Zeilberger's Maple Package DOMINO
\footnote{$^1$}
{
\eighttt http://www.math.temple.edu/\Tilde zeilberg/tokhniot/DOMINO,
[{\eightrm Type:} MonoDimerSequence(13);]
}
 
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\centerline{Shalosh B. EKHAD\footnote{$^2$}
{\baselineskip=9pt
\eightrm  \raggedright
Department of Mathematics,  Temple University, 
Philadelphia,  PA 19122.
ekhad@math.temple.edu ;
\break http://www.math.temple.edu/\Tilde ekhad .  
Oct. 14,  1997. I wish to thank Steve Finch for
raising the question.
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