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A206930
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Number of n X n 0..1 arrays avoiding 0 0 0 horizontally and 0 1 1 vertically.
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0
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2, 16, 211, 6837, 418876, 40316253, 8138711727, 2968348851593, 1635655868695143, 1996781212118762256, 4440970754945359464401, 13563038968625915203795793
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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=4
..1..1..0..1....1..1..1..0....1..1..0..1....1..1..0..1....0..1..1..0
..1..0..0..1....0..0..1..1....0..1..0..1....1..1..0..1....0..0..1..0
..0..0..1..0....1..1..1..0....1..0..0..1....0..1..1..0....0..0..1..1
..0..1..0..1....0..0..1..0....0..1..0..1....0..1..0..0....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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