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A209472
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Number of n X 4 0..2 arrays with every element value z a city block distance of exactly z from another element value z.
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1
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10, 635, 46470, 2497939, 128482557, 6446131005, 325528559843, 16644234605381, 852914715264837, 43670664954372485, 2233712112728209837, 114208859183577359217, 5839967102661447809375, 298652899566008996574607
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OFFSET
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1,1
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COMMENTS
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LINKS
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EXAMPLE
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Some solutions for n=3
..0..0..0..0....0..0..2..2....2..2..2..2....2..0..0..0....2..1..1..1
..1..0..2..0....0..2..2..0....1..1..2..0....2..2..1..2....0..2..1..1
..1..1..0..2....1..1..1..2....1..0..0..0....0..2..1..1....2..0..0..1
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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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