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A219145
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Unchanging value maps: number of 4Xn binary arrays indicating the locations of corresponding elements unequal to no horizontal, diagonal or antidiagonal neighbor in a random 0..2 4Xn array
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0
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1, 51, 331, 1774, 10505, 59127, 341648, 1963817, 11341895, 65406069, 377314947, 2175983774, 12550566460, 72389111386, 417539600863, 2408347532016, 13891206637891
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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=3
..0..0..1....0..0..0....0..0..1....0..1..0....0..0..0....1..0..0....0..0..0
..0..0..1....0..0..1....1..0..0....0..0..0....0..0..1....1..0..0....0..0..1
..1..0..0....1..0..0....1..0..1....1..0..1....1..0..0....1..0..0....1..0..1
..0..0..1....0..0..0....1..1..1....0..0..1....1..0..1....1..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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