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A283521
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Number of nX7 0..1 arrays with no 1 equal to more than three of its horizontal, vertical and antidiagonal neighbors, with the exception of exactly two elements.
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1
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0, 703, 241796, 34279720, 4331276717, 510843580504, 56913176714906, 6121670820777639, 641300961433598943, 65816441365940780452, 6645264195595547215366, 662013827914324498953906
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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=2
..0..0..1..0..1..1..1. .1..1..1..0..1..1..1. .1..0..1..1..1..1..0
..1..0..0..1..1..1..0. .1..1..1..1..0..1..1. .1..0..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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