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A197234
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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 4,3,0,1,2 for x=0,1,2,3,4
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1
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13, 465, 24723, 1207249, 56349129, 2633810897, 126615582841, 6025045947229, 285872930194581, 13601246931224843, 646768759804113503, 30743940022418521003, 1461787203230841289843, 69503782128520679756365
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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 4'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 2's
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LINKS
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EXAMPLE
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Some solutions for n=4
..0..0..0..2..0..1..0....0..0..0..0..0..2..0....0..0..0..2..0..0..0
..0..0..2..1..1..3..0....0..2..2..0..0..2..0....0..1..3..1..2..2..0
..0..0..1..3..1..1..2....0..2..2..0..2..1..0....0..0..1..0..0..1..0
..0..0..2..0..0..2..0....0..0..0..0..1..3..1....0..0..2..0..1..3..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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