The OEIS is supported by the many generous donors to the OEIS Foundation.
%I #5 Mar 31 2012 12:36:15
%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