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A259242
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Number of (n+1)X(n+1) 0..1 arrays with each 2X2 subblock having clockwise pattern 0000 0011 or 0111
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1
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9, 65, 720, 14425, 451481, 25462352, 2259371001, 359730429763, 90571705672192, 40745743533702439, 29115984372311031043, 37023356202692415717856, 75090733417483065667600023, 269938147719275944289836747059
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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..1..1..0....0..0..1..0..0....1..1..0..0..1....0..1..0..0..1
..0..0..0..1..0....1..1..1..1..1....0..1..1..1..1....1..1..1..1..1
..0..0..0..1..1....1..0..1..0..0....0..1..0..1..0....1..0..1..0..1
..1..1..1..1..0....1..1..1..1..1....0..1..0..1..0....1..1..1..1..1
..0..1..0..1..1....1..0..0..0..1....1..1..1..1..0....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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