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A317822
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Number of nX7 0..1 arrays with every element unequal to 1, 2 or 3 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.
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1
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8, 1634, 3150, 48526, 179111, 1458418, 7370716, 49813114, 285365386, 1801862295, 10780737885, 66250927857, 402362478261, 2454261649360, 14947185490935, 91152367042211, 554926695836229, 3385228443629637, 20612211780845789
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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..1..1..0..1..0..0. .0..1..1..1..0..0..1. .0..1..0..1..0..0..1
..1..1..0..1..1..0..1. .0..1..0..0..0..1..0. .1..0..0..1..1..1..1
..0..0..0..1..0..0..1. .1..0..0..0..1..1..0. .0..0..1..1..0..0..0
..0..0..1..1..0..0..0. .1..0..1..1..1..0..0. .0..1..1..0..0..0..0
..1..0..1..0..0..1..1. .0..1..1..0..0..0..1. .0..1..1..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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