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A207508
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Number of n X n 0..1 arrays avoiding 0 0 0 and 0 1 1 horizontally and 0 0 1 and 1 1 1 vertically.
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1
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2, 16, 72, 438, 2638, 10340, 50322, 221672, 938572, 4001444, 16081184, 65882872, 265536422, 1041167756, 4136910380, 16075083164, 62441083194, 240925209706, 924668629616, 3528820338804, 13446998876758, 50858295309890
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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..0..1..0....0..1..0..0....1..1..0..1....1..0..0..1
..1..1..1..1....0..1..0..1....0..0..1..0....1..0..1..0....1..1..0..1
..0..0..1..0....1..0..1..0....0..1..0..0....0..1..0..0....0..1..0..0
..0..1..0..0....1..1..0..1....0..1..0..0....0..0..1..0....1..0..0..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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