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A221780
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T(n,k)=Number of nXk arrays of occupancy after each element stays put or moves to some horizontal, diagonal or antidiagonal neighbor, without move-in move-out left turns
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6
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1, 3, 1, 8, 25, 1, 21, 258, 184, 1, 55, 2631, 7676, 1367, 1, 144, 26861, 311500, 230621, 10179, 1, 377, 273816, 12449782, 36959565, 6911480, 75782, 1, 987, 2792384, 496125037, 5758151603, 4383899151, 207263892, 564169, 1, 2584, 28476902
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OFFSET
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1,2
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COMMENTS
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Table starts
.1.......3..........8...........21............55..........144.........377
.1......25........258.........2631.........26861.......273816.....2792384
.1.....184.......7676.......311500......12449782....496125037.19763197787
.1....1367.....230621.....36959565....5758151603.889201607649
.1...10179....6911480...4383899151.2659707427087
.1...75782..207263892.519828193272
.1..564169.6215606652
.1.4200043
.1
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LINKS
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EXAMPLE
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Some solutions for n=3 k=4
..0..3..0..1....0..2..3..1....0..1..1..3....0..2..1..0....0..0..0..0
..0..2..3..1....0..2..1..0....1..0..2..0....0..0..4..0....1..4..3..1
..0..1..0..1....2..0..0..1....1..0..3..0....1..2..0..2....0..0..1..2
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CROSSREFS
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KEYWORD
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AUTHOR
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STATUS
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approved
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