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A197776
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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 3,2,1,1,1 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 3's, every 1 is next to 1 2's, every 2 is next to 2 1's, every 3 is next to 3 1's, every 4 is next to 4 1's
Diagonal of A197782
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LINKS
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Table of n, a(n) for n=1..8.
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EXAMPLE
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Some solutions containing all values 0 to 4 for n=4
..2..1..3..1....0..2..1..1....2..1..3..1....1..3..1..2....1..3..1..2
..1..4..1..2....0..1..1..2....1..4..1..2....2..1..4..1....2..1..4..1
..0..1..1..0....1..4..1..2....3..1..1..2....0..0..1..0....0..1..1..0
..1..2..2..1....2..1..3..1....1..2..0..1....0..0..2..1....1..2..2..1
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CROSSREFS
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Sequence in context: A113064 A352860 A291807 * A197606 A207979 A129963
Adjacent sequences: A197773 A197774 A197775 * A197777 A197778 A197779
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KEYWORD
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nonn
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AUTHOR
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R. H. Hardin Oct 18 2011
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STATUS
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approved
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