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Number of 5Xn 0..n-1 arrays with no column j greater than or equal to than column j-1 in all rows
1

%I #4 May 31 2012 13:02:29

%S 1,781,10669771,801439905901,212180664326328751,

%T 153322267564381742818531,255478496068295791189905082231,

%U 870723772630086411238479367066774381,5548968833443344688974970978997318268321031

%N Number of 5Xn 0..n-1 arrays with no column j greater than or equal to than column j-1 in all rows

%C Row 5 of A212943

%H R. H. Hardin, <a href="/A212947/b212947.txt">Table of n, a(n) for n = 1..18</a>

%e Some solutions for n=4

%e ..1..1..0..0....1..2..3..2....3..2..1..3....2..0..1..2....1..0..3..3

%e ..3..1..3..0....3..1..1..1....1..3..0..0....3..2..0..1....3..2..1..3

%e ..1..0..1..3....3..3..3..1....1..0..2..0....2..1..1..1....2..2..2..2

%e ..2..3..1..3....3..1..3..3....1..0..2..0....0..2..1..3....3..2..2..3

%e ..2..2..1..1....3..1..0..3....1..1..1..1....3..1..2..0....1..1..2..1

%K nonn

%O 1,2

%A _R. H. Hardin_ May 31 2012