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%I A181203 #3 Mar 31 2012 12:35:49
%S A181203 0,840,360360,199536480,140229804000,118949931243000,
%T A181203 117015012361447200,129624266420759510400,158211402715245473193600,
%U A181203 209298196564031904834960000,296336346592302886974184080000
%N A181203 a(n)=0!*1!*2!*3!*4!*(5*n)!*10*n*(n-1) / ((n)!*(n+1)!*(n+2)!*(n+3)!*(n+4)!)
%C A181203 (Empirical) Number of nX5 matrices containing a defective permutation of 1..5*n in strictly increasing order rowwise and columnwise, with one permutation value omitted and one repeated (see example)
%C A181203 Column 5 of A181204
%H A181203 R. H. Hardin, <a href="/A181203/b181203.txt">Table of n, a(n) for n=1..50</a>
%e A181203 Some solutions for 2X5
%e A181203 ..1..4..5..6..8....1..2..4..7..9....1..3..5..8..9....1..2..5..6..8
%e A181203 ..3..5..7..9.10....5..6..8..9.10....4..6..7..9.10....3..4..8..9.10
%K A181203 nonn
%O A181203 1,2
%A A181203 _R. H. Hardin_ Oct 10 2010

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