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A304135
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Number of n X n 0..1 arrays with every element unequal to 0, 2, 3 or 6 king-move adjacent elements, with upper left element zero.
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0
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1, 4, 5, 11, 39, 39, 48, 11067, 8405, 540, 15841950, 66160098, 1198599
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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..0..0. .0..1..0..0..1. .0..0..0..1..0. .0..1..1..0..1
..0..0..0..0..0. .1..1..0..0..1. .0..0..0..1..1. .1..0..1..0..0
..0..0..0..0..0. .0..0..0..1..0. .0..0..0..0..0. .0..1..1..1..1
..0..0..0..0..0. .0..0..1..0..0. .0..0..0..1..0. .0..1..1..1..1
..1..1..1..1..1. .1..1..0..0..1. .1..1..1..0..1. .0..1..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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