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A189545
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T(n,k)=Number of arrangements of n+1 nonzero numbers x(i) in -k..k with the sum of trunc(x(i)/x(i+1)) equal to zero
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16
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0, 4, 4, 12, 8, 0, 24, 28, 44, 12, 40, 72, 192, 152, 0, 60, 152, 544, 964, 552, 40, 84, 264, 1340, 3664, 5416, 2000, 0, 112, 432, 2520, 11276, 26804, 31280, 7628, 140, 144, 660, 4620, 26152, 97836, 204544, 173792, 28440, 0, 180, 968, 7716, 56440, 274132, 911144
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OFFSET
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1,2
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COMMENTS
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Table starts
...0......4.......12........24.........40..........60...........84
...4......8.......28........72........152.........264..........432
...0.....44......192.......544.......1340........2520.........4620
..12....152......964......3664......11276.......26152........56440
...0....552.....5416.....26804......97836......274132.......683144
..40...2000....31280....204544.....911144.....3022220......8655424
...0...7628...173792...1526520....8485264....33638540....111406336
.140..28440...977092..11544464...80270588...379997096...1456853916
...0.108792..5562216..87396896..762015216..4324466328..19269747584
.504.411888.31839976.665272176.7245223968.49387377504.256327259704
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LINKS
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EXAMPLE
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Some solutions for n=7 k=5
.-5...-5...-5...-5...-5...-5...-5...-5...-5...-5...-5...-5...-5...-5...-4...-5
.-5...-5...-5...-5...-5...-5...-5...-5...-5...-5...-5...-5...-5...-5...-5...-5
..1...-2...-2...-1....1...-5...-3....4....3...-4....3...-3....3....1...-4....3
..4....4....2...-3...-3....2....5...-1....5....4...-2....4....5...-1....3....3
..1...-1....3....2...-2...-3...-2....5...-5....3....3...-1....4...-2....4....3
.-3...-1...-1...-1...-3....1....5....2...-2....5....5....4....5...-5....3...-4
.-4....4...-1....3...-1...-3...-3....1....5...-2...-5....5....5...-1....4....5
..5....5....4...-1...-2...-1...-3....4...-4...-5...-2....2...-2....3...-3...-2
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CROSSREFS
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Column 1 is A028329(n/2) for even n
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KEYWORD
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AUTHOR
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STATUS
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approved
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