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A196728
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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 2,1,4,0,3 for x=0,1,2,3,4
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1
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13, 890, 55431, 2810070, 155884161, 8480784814, 466328648058, 25627044432018, 1401061856163452, 76824706430678661, 4214277934317634634, 230987804774562016288, 12662004308972053192420, 694169878513382740535063
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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 1's, every 2 is next to 2 4's, every 3 is next to 3 0's, every 4 is next to 4 3's
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LINKS
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EXAMPLE
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Some solutions for n=4
..0..0..1..0..1..1..0....0..0..0..1..1..0..0....0..0..0..1..1..0..0
..0..3..1..0..0..0..3....0..0..0..0..0..0..3....0..3..3..0..0..0..0
..0..0..0..3..0..0..0....0..0..0..3..1..0..0....0..0..0..0..0..3..1
..0..0..0..1..1..0..0....0..3..0..0..1..0..0....0..0..0..1..1..0..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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