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Number of nX4 arrays of occupancy after each element stays put or moves to some king-move neighbor, without move-in move-out straight through or left turns
0

%I #3 Jan 31 2013 18:15:59

%S 13,3487,508281,75313013,11143187999,1648683705320,243924224883451,

%T 36085841660921104,5338383610734905950,789733272292081157838

%N Number of nX4 arrays of occupancy after each element stays put or moves to some king-move neighbor, without move-in move-out straight through or left turns

%C Column 4 of A221925

%e Some solutions for n=3

%e ..0..0..0..1....0..2..1..3....0..4..0..3....0..1..2..0....0..3..0..1

%e ..0..5..0..0....0..0..0..1....0..1..0..0....0..2..0..1....0..2..1..1

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Jan 31 2013