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A297504
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Number of nX6 0..1 arrays with every 1 horizontally, diagonally or antidiagonally adjacent to 1 or 2 neighboring 1s.
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1
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21, 729, 8803, 191192, 3624914, 66289769, 1272836591, 23896899569, 450529429259, 8509989217247, 160423654526876, 3026744089971807, 57099188342748031, 1077069529621543033, 20318551052028606846, 383290619891741250595
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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=4
..0..0..0..1..0..0. .0..0..0..0..1..1. .0..1..1..1..0..0. .1..1..1..0..1..0
..0..0..1..0..0..1. .0..0..1..0..0..0. .0..0..0..0..1..1. .0..0..0..0..1..1
..0..0..0..0..1..1. .0..1..1..0..0..0. .0..1..0..0..0..0. .0..1..0..0..0..0
..0..1..1..0..1..0. .0..0..0..1..0..0. .1..0..0..1..1..1. .0..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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