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A197749
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Number of nX7 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 3,3,0,1,0 for x=0,1,2,3,4
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1
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13, 465, 17332, 462515, 15943658, 517762136, 16946352492, 558436739769, 18226535390462, 597638865062474, 19604855669620153, 642346166847903042, 21058400260743006736, 690290048778192927506, 22625839121192679890893
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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 3's, every 1 is next to 1 3's, every 2 is next to 2 0's, every 3 is next to 3 1's, every 4 is next to 4 0'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..2..0..0..0..0..0....0..0..0..0..0..0..0....0..1..3..1..0..0..2
..2..2..0..4..0..0..2....0..4..0..0..0..0..0....1..0..1..0..4..0..0
..0..0..0..0..1..0..2....0..0..2..1..0..0..0....3..1..1..2..0..4..0
..0..0..2..1..3..1..0....0..2..1..3..1..2..0....1..1..3..1..0..0..0
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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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