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A196712
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Number of n X n 0..4 arrays with each element x equal to the number of its horizontal and vertical neighbors equal to 4,0,2,1,3 for x=0,1,2,3,4
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0
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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 0's, every 2 is next to 2 2's, every 3 is next to 3 1'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..0..1....2..2..0..0....2..2..2..1....1..0..0..1....1..0..1..1
..1..3..1..3....2..2..1..1....2..0..2..0....1..1..1..1....3..1..1..0
..3..1..1..1....0..1..1..3....2..2..2..0....0..1..3..0....1..1..1..0
..1..0..0..0....1..1..0..1....0..0..0..0....0..1..1..0....0..0..1..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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