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A208053
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Number of n X 5 nonnegative integer arrays with new values 0 upwards introduced in row major order and no element equal to any horizontal, vertical or antidiagonal neighbor (colorings ignoring permutations of colors).
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2
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15, 4140, 18171918, 346212384169, 18633407199331522, 2254561102047453593406, 531301410253869099621138608, 220853044418109083337335323829443, 150574889720989154216201888327789028154, 159239694548038760947916228538237933340567164
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OFFSET
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1,1
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LINKS
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EXAMPLE
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Some solutions for n=4
..0..1..0..1..2....0..1..0..1..0....0..1..0..1..0....0..1..0..1..0
..2..3..2..0..1....2..3..2..3..1....2..3..2..3..1....2..3..2..3..1
..0..1..3..2..0....0..1..0..2..0....4..1..0..2..4....0..1..0..2..0
..4..0..1..3..1....2..3..1..3..1....0..2..1..0..5....2..3..4..5..1
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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