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A196975
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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 3,2,1,0,4 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 0's, every 4 is next to 4 4's
Diagonal of A196982
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LINKS
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Table of n, a(n) for n=1..9.
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EXAMPLE
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Some solutions for n=4
..2..1..0..1....0..0..1..2....0..1..2..1....1..2..2..1....0..0..0..0
..1..0..1..2....0..0..0..1....0..1..2..1....0..1..1..1....0..1..2..1
..0..0..1..2....0..2..1..1....1..0..2..1....0..0..0..2....1..1..2..0
..1..2..1..1....0..1..1..2....2..1..1..0....0..0..0..1....2..1..1..0
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CROSSREFS
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Sequence in context: A214348 A195196 A012635 * A247540 A171800 A195244
Adjacent sequences: A196972 A196973 A196974 * A196976 A196977 A196978
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KEYWORD
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nonn
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AUTHOR
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R. H. Hardin Oct 08 2011
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STATUS
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approved
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