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A254199
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Number of length n 1..(3+2) arrays with no leading or trailing partial sum equal to a prime
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1
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2, 1, 4, 9, 21, 47, 118, 333, 984, 3362, 12643, 39490, 98542, 227138, 581068, 1805114, 6540668, 24406560, 85426548, 274421967, 815755674, 2293410096, 6495970695, 20483223847, 74509476318, 290215121856, 1104108812114, 3894326230239
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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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All solutions for n=4
..4....1....4....4....1....4....4....4....1
..4....3....2....5....5....4....2....2....3
..2....2....4....5....3....4....2....3....5
..4....4....4....4....1....4....4....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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