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A197088
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Number of nX6 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 4,3,2,0,1 for x=0,1,2,3,4
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1
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1, 65, 1780, 37952, 939690, 21996614, 522569033, 12390326286, 293837693200, 6966924806564, 165206045134788, 3917486496222700, 92893560385495116, 2202749723178772681, 52232959654975192248, 1238579861912517506541
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OFFSET
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1,2
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COMMENTS
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Every 0 is next to 0 4's, every 1 is next to 1 3's, every 2 is next to 2 2's, every 3 is next to 3 0'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 for n=4
..0..1..0..3..0..0....0..3..0..0..0..0....0..0..3..0..0..0....0..2..2..0..3..0
..0..3..0..0..3..1....0..0..1..0..0..3....3..0..0..0..0..0....0..2..2..3..0..3
..0..0..3..0..0..0....3..0..3..0..0..0....0..0..3..0..0..3....0..0..0..0..3..0
..0..0..1..0..3..0....0..3..0..0..0..0....0..0..1..0..0..0....0..0..3..0..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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