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A196647
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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 3,4,0,2,1 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 4's, every 2 is next to 2 0's, every 3 is next to 3 2's, every 4 is next to 4 1's
Diagonal of A196653
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LINKS
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Table of n, a(n) for n=1..10.
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EXAMPLE
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Some solutions for n=4
..0..1..0..0....2..0..0..0....2..0..2..0....0..0..0..0....0..1..0..0
..1..4..1..2....0..2..2..2....0..2..1..0....2..0..0..0....1..4..1..0
..0..1..0..0....0..2..0..0....0..1..4..1....2..0..2..2....0..1..0..0
..0..0..0..0....0..2..0..0....0..0..1..0....0..0..2..0....2..0..0..2
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CROSSREFS
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Sequence in context: A196323 A003148 A033910 * A274579 A152578 A300529
Adjacent sequences: A196644 A196645 A196646 * A196648 A196649 A196650
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KEYWORD
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nonn
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AUTHOR
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R. H. Hardin Oct 04 2011
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STATUS
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approved
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