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A188325
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Number of nondecreasing arrangements of n nonzero numbers in -(n-1)..(n-1) with sum zero
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1
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0, 1, 2, 10, 40, 197, 980, 5142, 27632, 152191, 853564, 4863492, 28075992, 163920550, 966421928, 5746596806, 34428962746, 207654949801, 1259963104618, 7686160299232, 47116518171284, 290105437233107, 1793451033655758
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OFFSET
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1,3
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COMMENTS
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LINKS
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EXAMPLE
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Some solutions for n=6
.-5...-4...-5...-4...-4...-4...-5...-4...-4...-3...-5...-5...-5...-2...-5...-2
.-3...-2...-4...-2...-4...-2...-3...-2...-3...-2...-1...-4...-3...-2...-3...-2
.-1....1....1...-1...-1....1....2...-1....1...-1...-1...-4...-3...-2...-1...-2
..1....1....2....2....1....1....2...-1....1...-1....1....3....1...-2....1...-1
..3....2....2....2....3....1....2....3....1....3....2....5....5....4....4....2
..5....2....4....3....5....3....2....5....4....4....4....5....5....4....4....5
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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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