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Number of nX3 array permutations with each element remaining in its original row or its original column
0

%I #5 Mar 31 2012 12:36:14

%S 6,82,2720,194568,26101232,5919004912,2103543163584

%N Number of nX3 array permutations with each element remaining in its original row or its original column

%C Column 3 of A188808

%e Some solutions for 3X3

%e ..6..0..8....2..0..1....1..4..8....6..0..8....0..4..8....6..1..5....6..2..1

%e ..5..1..4....3..4..5....3..5..2....5..4..3....5..7..2....3..7..4....5..4..3

%e ..3..7..2....6..8..7....0..6..7....7..1..2....3..1..6....0..8..2....0..7..8

%K nonn

%O 1,1

%A _R. H. Hardin_ Apr 11 2011