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 A189542 Number of arrangements of n+1 nonzero numbers x(i) in -6..6 with the sum of trunc(x(i)/x(i+1)) equal to zero 1

%I

%S 60,264,2520,26152,274132,3022220,33638540,379997096,4324466328,

%T 49387377504,566509205348,6521404038024,75307822934828,

%U 872056487276532,10122186382107364,117736171713864168,1371964294216603880

%N Number of arrangements of n+1 nonzero numbers x(i) in -6..6 with the sum of trunc(x(i)/x(i+1)) equal to zero

%C Column 6 of A189545

%H R. H. Hardin, <a href="/A189542/b189542.txt">Table of n, a(n) for n = 1..121</a>

%e Some solutions for n=5

%e ..4...-6....1....3...-3...-2...-4...-6...-6...-2...-3...-3...-6...-4...-3...-1

%e .-5...-5....1....1...-4....1....2....2...-5...-5....2...-4....2...-5...-4...-5

%e ..4...-6...-1....4....4...-4...-5....1....5...-5....2....4....2....5...-5....3

%e ..4....3....5....4....3....5....6...-4....4....3...-3....1....6....4...-4...-2

%e .-2....2...-5...-1....3....2....4....6...-3...-5...-4....6....3....3...-6...-1

%e .-1...-3...-5....2...-2....4....3....5...-4....6....5...-2....4...-3....4....5

%K nonn

%O 1,1

%A _R. H. Hardin_ Apr 23 2011

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Last modified March 21 13:27 EDT 2023. Contains 361402 sequences. (Running on oeis4.)