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A208263
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Number of n X n 0..1 arrays with new values 0..1 introduced in row major order and no element equal to more than two of its immediate leftward or upward or left-upward diagonal neighbors
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1
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1, 7, 161, 11929, 2867739, 2234126207, 5641457245533, 46171961042899417, 1224814800337927770335, 105309458529148583423889079, 29347371781481633173790977728301, 26507936613513086328494176843991041391
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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=4
..0..0..1..0....0..1..0..1....0..0..0..1....0..0..0..1....0..0..1..0
..0..1..1..0....0..0..1..0....0..1..1..0....1..0..1..1....1..0..0..0
..1..1..0..0....1..1..1..0....1..1..0..1....0..0..1..0....0..1..1..0
..1..0..0..1....0..1..0..0....0..0..1..0....0..1..0..0....1..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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