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A197402
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Number of nXn 0..4 arrays with each element x equal to the number of its horizontal and vertical neighbors equal to 3,0,1,1,1 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 0'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 A197409
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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
..1..3..1..0....0..1..1..0....0..0..0..1....1..0..2..1....1..0..1..2
..0..1..1..0....0..1..4..1....2..1..1..1....3..1..1..0....1..1..4..1
..2..1..4..1....2..1..1..3....1..4..1..0....1..4..1..0....0..1..1..0
..1..0..1..2....1..0..0..1....0..1..3..1....0..1..3..1....1..3..1..0
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CROSSREFS
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Sequence in context: A153820 A009139 A086018 * A213133 A159037 A138589
Adjacent sequences: A197399 A197400 A197401 * A197403 A197404 A197405
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KEYWORD
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nonn
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AUTHOR
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R. H. Hardin Oct 14 2011
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STATUS
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approved
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