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A296592
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Number of n X n 0..1 arrays with each 1 horizontally, vertically or antidiagonally adjacent to 1, 2 or 3 neighboring 1's.
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1
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1, 11, 228, 16524, 4254377, 3553672817, 10046940260800, 95593682736547484, 3048748598852691707372, 326806923379819512235330165, 117671612236955708975981838902711
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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..0..1. .0..1..1..0. .1..0..0..0. .0..0..0..0. .1..0..1..0
..1..0..1..1. .0..0..1..1. .1..0..1..0. .1..0..1..1. .1..0..1..0
..1..0..0..1. .0..1..0..1. .1..0..1..1. .1..0..1..0. .1..0..1..0
..0..0..1..1. .1..0..1..1. .1..1..0..1. .1..1..0..0. .0..1..1..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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