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A208703
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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 right-upward antidiagonal neighbors
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1
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1, 8, 196, 16084, 4226368, 3613193828, 10001404535216, 89755737081698964, 2610569024927748701352, 246105734855228896970291844, 75198808251676193628977268566832, 74474161314983311603786393034039933768
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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..0..0..1....0..1..0..1....0..0..0..1....0..1..1..0
..0..0..1..0....1..0..1..1....1..0..1..1....1..0..0..0....0..0..1..0
..1..1..0..0....0..0..1..0....0..0..0..1....1..1..1..1....0..0..1..1
..1..1..0..0....0..1..0..0....0..1..0..1....1..0..1..1....1..0..0..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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