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A188807 Number of nX4 array permutations with each element remaining in its original row or its original column.

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%I A188807 #6 Jul 22 2025 11:23:30
%S A188807 24,1313,194568,72104097,57951767544
%N A188807 Number of nX4 array permutations with each element remaining in its original row or its original column.
%C A188807 Column 4 of A188808
%e A188807 Some solutions for 3X4
%e A188807 ..1..9..6..0....1..9..3..0....0..1..2.11....3..9..6..2....0..1..3..7
%e A188807 ..8..4..7..3....6..4.10..5....7..5..4..3....0..5..4..7....5..6..2..4
%e A188807 .10..5..2.11...11..8..2..7...10..9..6..8...10..1.11..8....9..8.10.11
%K A188807 nonn
%O A188807 1,1
%A A188807 _R. H. Hardin_ Apr 11 2011

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