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A197315
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Number of nX6 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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4, 6, 79, 790, 4780, 24704, 189212, 1400102, 8813744, 62844698, 436492213, 3010736948, 20777197101, 144191070226, 998239321771, 6903357295660, 47811537748912, 330940337259970, 2291691748249353, 15860451380186238
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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
..2..1..1..0..3..0....0..3..0..3..0..1....0..1..0..1..1..2....1..1..2..1..1..0
..1..2..0..4..0..1....1..0..4..0..3..1....2..1..3..0..2..1....0..3..0..3..0..1
..1..0..4..0..2..1....1..2..0..3..0..2....1..2..0..4..0..1....3..0..4..0..2..1
..0..3..0..1..1..2....2..1..1..2..1..1....1..0..3..0..3..0....0..3..0..1..1..2
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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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