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 A189545 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 16
 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 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS 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 LINKS R. H. Hardin, Table of n, a(n) for n = 1..757 EXAMPLE 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 CROSSREFS Column 1 is A028329(n/2) for even n Row 1 is A046092(n-1) Sequence in context: A272789 A273152 A322785 * A326993 A272990 A273645 Adjacent sequences: A189542 A189543 A189544 * A189546 A189547 A189548 KEYWORD nonn,tabl AUTHOR R. H. Hardin Apr 23 2011 STATUS approved

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Last modified December 1 08:54 EST 2022. Contains 358459 sequences. (Running on oeis4.)