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Number of nX4 arrays of occupancy after each element moves to some king-move neighbor, without 2-loops or left turns
0

%I #3 Jan 26 2013 06:37:30

%S 0,378,27692,2341962,197382906,16607042116,1396934985595,

%T 117495706868182,9880812782673851

%N Number of nX4 arrays of occupancy after each element moves to some king-move neighbor, without 2-loops or left turns

%C Column 4 of A221804

%e Some solutions for n=3

%e ..0..1..2..0....1..1..0..0....1..0..0..0....0..2..0..0....0..4..1..0

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

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

%K nonn

%O 1,2

%A _R. H. Hardin_ Jan 26 2013