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A304296
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Number of n X n 0..1 arrays with every element unequal to 1, 2, 5 or 8 king-move adjacent elements, with upper left element zero.
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0
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0, 3, 3, 4, 62, 237, 2673, 47501, 555463, 25873708, 782284349, 32914635985, 3458153456492, 263002178989873, 36033069960036119
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OFFSET
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1,2
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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..0. .0..0..0..0..0. .0..0..0..1..0. .0..0..1..0..0
..1..0..0..0..0. .1..0..1..0..1. .0..1..0..0..0. .1..0..0..0..1
..0..0..0..0..0. .0..0..0..0..0. .0..0..0..0..1. .0..0..0..0..0
..1..0..0..1..0. .0..0..0..0..0. .0..0..0..0..0. .0..1..0..0..0
..0..0..0..0..0. .0..1..0..1..0. .0..1..0..1..0. .0..0..0..1..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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