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A305220
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Number of nX5 0..1 arrays with every element unequal to 2, 3, 5, 6 or 7 king-move adjacent elements, with upper left element zero.
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1
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0, 18, 31, 170, 792, 3759, 18876, 90956, 474685, 2426611, 12314640, 63224089, 324415176, 1661929097, 8516748514, 43702916079, 224090240059, 1149079576777, 5893973921589, 30227924527477, 155026753983222, 795103603034446
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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..1..0..0..1. .0..1..0..0..1. .0..1..1..0..1. .0..1..1..0..1
..0..1..1..0..1. .1..0..1..0..1. .1..0..0..1..0. .0..1..0..1..0
..0..0..0..1..1. .0..1..1..0..1. .1..1..0..1..0. .0..1..0..0..0
..1..1..1..0..1. .1..0..1..0..1. .1..0..0..0..0. .0..0..1..1..0
..0..1..0..0..1. .0..1..0..0..1. .1..0..1..0..1. .1..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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