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A283633
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Number of nX7 0..1 arrays with no 1 equal to more than one of its horizontal, diagonal and antidiagonal neighbors, with the exception of exactly two elements.
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1
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13, 2076, 127635, 6345928, 272974255, 10666178322, 392539665568, 13797245749346, 468742166961530, 15502521715119538, 501795715376231851, 15957781722597713676, 500040694917490469472, 15473893797643876157146
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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=3
..1..0..0..0..1..1..1. .1..0..1..0..0..0..1. .1..1..0..0..0..0..1
..0..1..0..0..0..0..0. .0..0..1..0..0..1..0. .0..1..0..1..0..0..0
..1..0..0..1..1..0..1. .1..0..1..0..0..1..1. .0..0..0..1..1..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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