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A196484
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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 3,0,2,1,4 for x=0,1,2,3,4
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1
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17, 468, 5370, 131650, 3307716, 78510820, 1740363958, 38249638826, 844387380911, 18649094172670, 413597303215047, 9198603912775814, 204434933733971755, 4539111860110138352, 100762741109236752675, 2236881797334686400439
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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 0's, every 2 is next to 2 2's, every 3 is next to 3 1's, every 4 is next to 4 4's
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LINKS
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EXAMPLE
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Some solutions for n=4
..0..2..2..0..0..0..0....1..0..0..0..0..1..1....1..0..0..1..1..0..0
..1..2..2..1..2..2..0....3..1..1..1..1..1..0....1..2..2..1..1..2..2
..3..1..1..1..2..2..0....1..2..2..1..2..2..0....0..2..2..0..0..2..2
..1..0..0..0..0..1..1....0..2..2..0..2..2..0....1..1..0..0..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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