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A209609
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Number of nX7 1..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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6, 1674, 260861, 24912066, 2375975754, 223164388883, 20901164219657, 1975174382937912, 186937030477768141, 17682588982309202487, 1672438305942540396968, 158166123891896203653358
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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
..1..1..1..1..2..2..1....1..1..2..2..2..1..2....1..1..1..1..1..1..1
..1..1..2..1..2..1..1....1..1..2..2..2..1..1....1..2..2..2..2..1..1
..1..1..2..1..2..1..1....1..2..2..2..2..2..1....2..1..1..1..2..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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