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A300884
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Number of nX4 0..1 arrays with every element equal to 0, 1, 3, 4 or 5 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.
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1
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5, 3, 8, 40, 121, 465, 1822, 7045, 27552, 107582, 418774, 1634134, 6372604, 24848456, 96907225, 377944318, 1473935615, 5748325489, 22418429589, 87431292466, 340980199614, 1329816738811, 5186259016513, 20226307560063, 78882211351573
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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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FORMULA
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Empirical recurrence of order 96 (see link above)
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EXAMPLE
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Some solutions for n=5
..0..1..0..0. .0..0..1..1. .0..1..1..0. .0..1..0..0. .0..1..1..0
..1..0..0..0. .1..1..1..1. .0..0..0..1. .0..0..0..0. .0..0..0..1
..0..0..1..0. .0..0..1..1. .0..0..1..0. .0..1..0..0. .0..1..0..1
..0..0..0..0. .1..1..1..0. .0..0..0..1. .0..0..0..1. .0..0..0..0
..0..0..0..1. .0..1..1..1. .1..0..0..0. .0..0..0..0. .0..0..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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