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A265622
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Number of 4Xn 0..4*n-1 arrays with upper left zero and lower right 4*n-1 and each element differing from its horizontal and diagonal neighbors by a power of two.
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1
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16, 1098, 545952, 36820624, 41288839953, 26221405955605, 25544452579997378, 10202665890135311754, 6793627222521230286004, 3807755132746454550366863, 3480803626161613825050823467, 2175071862470489220837962752225
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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=2
..0..1....0..4....0..4....0..2....0..1....0..2....0..4....0..4....0..2....0..1
..1..2....3..4....0..4....3..4....6..4....3..1....2..1....3..1....3..2....6..4
..5..3....5..4....6..4....3..5....5..7....3..2....5..1....5..4....3..7....6..4
..6..7....5..7....5..7....3..7....5..7....3..7....5..7....3..7....6..7....6..7
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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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