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A183925
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Number of nondecreasing arrangements of n numbers in -7..7 with sum zero and sum of squares not greater than n*56/3
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1
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1, 5, 22, 83, 262, 794, 2117, 5278, 12584, 27893, 58831, 120973, 235504, 443653, 821738, 1459822, 2529977, 4337998, 7192569, 11698167, 18893169, 29678739, 45907880, 70687245, 106315189, 157902365, 233830545, 339336920, 487306673
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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
.-3...-5...-5...-3...-6...-6...-3...-5...-2...-6...-6...-4...-4...-3...-2...-2
..1...-2...-1...-1....2....0...-3...-1...-1...-1....1...-3...-2...-1...-1...-2
..1....2....0....0....2....3....0....1....0....2....1....0...-1....2....1...-1
..1....5....6....4....2....3....6....5....3....5....4....7....7....2....2....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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