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A226397
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Number of nondecreasing -6..6 vectors of length n whose dot product with some nonincreasing -6..6 vector equals n
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0
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2, 64, 344, 1646, 5272, 17812, 41428, 112060, 247684, 582700, 1099228, 2515470, 4309522, 8283534, 15224294, 25736894
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history;
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internal format)
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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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Some solutions for n=3
.-2...-6...-1...-1...-1...-1...-5...-2...-3...-3...-6...-5...-4...-3...-5...-3
..3...-1...-1....2...-1....3....4....2...-3....1....3....1...-3...-2....3...-2
..5....1....1....6....6....4....6....3...-3....4....6....5....5...-2....6...-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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