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 A221924 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
 13, 3487, 508281, 75313013, 11143187999, 1648683705320, 243924224883451, 36085841660921104, 5338383610734905950, 789733272292081157838 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Column 4 of A221925 LINKS EXAMPLE Some solutions for n=3 ..0..0..0..1....0..2..1..3....0..4..0..3....0..1..2..0....0..3..0..1 ..0..5..0..0....0..0..0..1....0..1..0..0....0..2..0..1....0..2..1..1 ..1..3..0..2....2..1..1..1....0..3..1..0....1..0..3..2....3..0..1..0 CROSSREFS Sequence in context: A221885 A134159 A221851 * A292109 A337147 A070905 Adjacent sequences:  A221921 A221922 A221923 * A221925 A221926 A221927 KEYWORD nonn AUTHOR R. H. Hardin Jan 31 2013 STATUS approved

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Last modified January 22 18:22 EST 2022. Contains 350484 sequences. (Running on oeis4.)