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A183916
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Number of nondecreasing arrangements of n numbers in -8..8 with sum zero
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2
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1, 9, 41, 177, 649, 2137, 6375, 17575, 45207, 109583, 252117, 553981, 1168261, 2374753, 4669367, 8908546, 16535154, 29927526, 52925886, 91617530, 155484150, 259062316, 424306230, 683919048, 1085984406, 1700352360, 2627337510
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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
.-6...-7...-7...-3...-7...-7...-4...-4...-4...-1...-2...-8...-6...-4...-5...-8
.-3...-5....2...-1....0....1...-2....1...-3...-1...-2...-1....1....0...-1....1
..4....4....2....0....0....1....0....1....3....0....1....4....2....1....1....3
..5....8....3....4....7....5....6....2....4....2....3....5....3....3....5....4
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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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