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A320408
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Number of nX7 0..1 arrays with every element unequal to 0, 1, 2, 4 or 5 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.
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1
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64, 700, 7049, 92578, 1353623, 19677729, 282206549, 4085687781, 58997871413, 854291464126, 12364136018320, 178956311530396, 2590922938391319, 37511252836334859, 543116212765934101, 7863666564278921803
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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=5
..0..0..0..1..1..1..0. .0..0..0..0..1..1..1. .0..0..0..1..1..1..1
..0..0..0..1..0..1..0. .0..0..1..0..1..0..1. .0..0..1..0..0..1..1
..0..1..1..1..0..0..1. .0..1..1..0..0..1..0. .0..1..0..1..1..1..1
..0..1..0..0..0..0..0. .0..0..0..0..0..0..0. .0..1..0..1..1..1..0
..0..0..1..0..0..0..1. .0..0..1..0..0..0..1. .0..1..1..1..0..1..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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