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%I #5 Mar 31 2012 12:36:15
%S 12,28,192,964,5416,31280,173792,977092,5562216,31839976,182830560,
%T 1054020072,6094150672,35317631800,205154575120,1194077810020,
%U 6961965310984,40654382303400,237732203953600,1391919066252408
%N Number of arrangements of n+1 nonzero numbers x(i) in -3..3 with the sum of trunc(x(i)/x(i+1)) equal to zero
%C Column 3 of A189545
%H R. H. Hardin, <a href="/A189539/b189539.txt">Table of n, a(n) for n = 1..200</a>
%e Some solutions for n=5
%e ..1....3....3...-2...-1....2...-2....2....3...-2...-3...-3...-3....2....2....1
%e .-2....1....2...-2...-1....1....3....1....3...-2...-2....2....3....1...-1...-1
%e ..2....2....3....2....1....3....3....2....3...-2....2....1....2...-3...-2....3
%e .-2...-2...-1....2...-3....2....3...-1...-3...-3...-3....3....1....2....3....3
%e .-1....1...-1...-3....2...-2....3....2....2....1...-2...-2...-2...-1....3....3
%e .-3....2...-1....3....2....1...-1...-3....3....1....2...-3....1...-1....2...-2
%K nonn
%O 1,1
%A _R. H. Hardin_ Apr 23 2011
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