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A197078
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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 3,1,2,4,0 for x=0,1,2,3,4
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1
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13, 487, 13286, 445506, 14895018, 513380599, 17446576240, 592290047724, 20128502440024, 683993118482402, 23243767206546673, 789980959730204326, 26850332922315114822, 912620325896540690864, 31019623434344238447439
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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 1's, every 2 is next to 2 2's, every 3 is next to 3 4'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 for n=4
..0..0..0..0..0..1..0....0..0..0..0..0..1..0....0..0..0..0..0..0..1
..1..1..0..2..2..1..0....1..0..0..0..0..1..0....0..0..0..1..1..0..1
..0..0..0..2..2..0..0....1..0..0..1..0..2..2....2..2..1..0..0..0..0
..0..0..1..1..0..1..1....0..0..0..1..0..2..2....2..2..1..0..1..1..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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