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A197316
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Number of nX7 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 0,1,1,0,0 for x=0,1,2,3,4
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1
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2, 27, 249, 2724, 24903, 189212, 2241018, 20425821, 208960627, 1984221109, 20223402011, 195734767851, 1964217477394, 19163046359315, 191509608470344, 1875354477655910, 18682249962661264, 183413216662448071
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OFFSET
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1,1
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COMMENTS
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Every 0 is next to 0 0's, every 1 is next to 1 1's, every 2 is next to 2 1's, every 3 is next to 3 0's, every 4 is next to 4 0's
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LINKS
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EXAMPLE
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Some solutions containing all values 0 to 4 for n=4
..0..2..1..1..2..0..1....0..3..0..3..0..1..0....1..1..0..2..1..1..2
..1..1..0..2..1..2..1....1..0..4..0..2..1..2....2..2..1..1..0..2..1
..2..0..4..0..1..2..2....1..2..0..3..1..0..1....1..0..2..0..4..0..1
..1..1..0..3..0..1..1....2..1..1..0..1..2..1....1..2..1..1..0..3..0
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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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