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A304927
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Number of n X n 0..1 arrays with every element unequal to 0, 1, 3, 5 or 7 king-move adjacent elements, with upper left element zero.
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0
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1, 5, 13, 73, 452, 2653, 15993, 118024, 920997, 12184613, 162877680, 2507024025, 36984184204, 682363665419
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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..1..0..0. .0..1..1..1..1. .0..0..0..0..0. .0..1..1..1..1
..0..0..0..0..0. .1..1..1..1..1. .1..0..0..0..0. .1..1..1..1..0
..0..0..0..0..0. .1..1..1..1..0. .0..0..0..0..0. .1..1..1..1..1
..0..0..0..0..1. .1..1..1..0..0. .0..0..0..0..0. .0..1..1..1..1
..1..0..0..0..0. .1..1..0..0..0. .1..0..0..0..1. .0..0..1..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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