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A207688
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Number of n X n 0..1 arrays avoiding 0 0 0 and 0 1 0 horizontally and 0 0 1 and 1 1 1 vertically.
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1
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2, 16, 60, 256, 1872, 15376, 145200, 1887876, 32939236, 653211364, 16761239040, 557862597604, 24505820603880, 1374667445474064, 89177394083197716, 7769360160391840000, 912190244879661701508, 129010731422391263108196
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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..1..1....1..1..0..1....1..0..0..1
..1..1..1..0....1..0..0..1....0..0..1..1....0..0..1..1....0..1..1..0
..0..0..1..1....0..1..1..0....1..1..0..0....1..1..0..0....1..0..0..1
..1..1..0..0....1..0..1..1....1..1..0..0....0..1..1..0....0..1..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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