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A222509
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T(n,k)=Number of nXk 0..1 arrays with exactly floor(nXk/2) elements unequal to at least one horizontal, diagonal or antidiagonal neighbor, with new values introduced in row major 0..1 order
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12
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1, 0, 0, 0, 0, 0, 3, 4, 4, 0, 4, 3, 4, 11, 0, 4, 10, 15, 35, 8, 0, 5, 32, 35, 84, 87, 44, 0, 20, 44, 170, 423, 497, 496, 144, 0, 27, 176, 441, 1753, 2066, 2862, 1335, 352, 0, 48, 326, 2192, 8489, 17674, 23678, 15420, 7552, 692, 0, 63, 888, 5416, 39873, 81537, 195968, 128889
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OFFSET
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1,7
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COMMENTS
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Table starts
.1.....0.......0........3..........4...........4............5...........20
.0.....0.......4........3.........10..........32...........44..........176
.0.....4.......4.......15.........35.........170..........441.........2192
.0....11......35.......84........423........1753.........8489........39873
.0.....8......87......497.......2066.......17674........81537.......800040
.0....44.....496.....2862......23678......195968......1802656.....17117005
.0...144....1335....15420.....128889.....2220730.....19892241....385142640
.0...352....7552....86570....1529195....25587208....473772613...8962277166
.0...692...21382...484976....8569032...297738400...5455705052.212898244002
.0..2488..122942..2751326..102004630..3488244716.132847734428
.0..6476..348597.15597305..577797690.41065342664
.0.17095.2045395.89022483.6918500106
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LINKS
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EXAMPLE
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Some solutions for n=3 k=4
..0..0..0..0....0..0..1..1....0..0..0..0....0..1..1..1....0..1..1..0
..0..0..0..0....0..0..1..1....0..0..0..0....1..1..1..1....1..1..1..1
..0..1..0..1....0..0..1..1....0..0..1..1....1..1..1..0....1..1..1..1
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CROSSREFS
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KEYWORD
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AUTHOR
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STATUS
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approved
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