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A197542
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Number of nX5 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 2,2,1,1,1 for x=0,1,2,3,4
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1
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4, 28, 61, 206, 494, 2095, 6279, 21530, 69977, 248366, 813400, 2838023, 9457181, 32284759, 108523371, 370702868, 1251432293, 4258479323, 14389442735, 48816423022, 165305055080, 561221682936, 1901461841900, 6447263273359
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OFFSET
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1,1
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COMMENTS
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Every 0 is next to 0 2's, every 1 is next to 1 2's, every 2 is next to 2 1's, every 3 is next to 3 1's, every 4 is next to 4 1's
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LINKS
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EXAMPLE
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Some solutions containing all values 0 to 4 for n=4
..0..1..2..2..1....1..2..2..1..0....1..1..0..1..2....1..2..2..1..0
..1..3..1..1..0....3..1..1..3..1....2..2..1..4..1....3..1..1..3..1
..2..2..1..4..1....1..4..1..2..2....1..3..1..1..0....1..4..1..2..2
..1..1..3..1..2....2..1..0..1..1....0..1..2..2..1....2..1..3..1..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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STATUS
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approved
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