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%I #5 Mar 31 2012 12:36:15
%S 0,42,152,462,1088,2128,3850,6474,10126,15224,22180,30900,42164,56514,
%T 73816,94984,120700,150836,186756,228696,276618,332204,396444,467948,
%U 549504,642000,744978,859846,988550,1129542,1286278,1458874,1646896
%N Number of arrangements of 4 nonzero numbers x(i) in -n..n with the sum of floor(x(i)/x(i+1)) equal to zero
%C Row 3 of A189498
%H R. H. Hardin, <a href="/A189500/b189500.txt">Table of n, a(n) for n = 1..200</a>
%e Some solutions for n=5
%e ..4...-2...-4...-2...-2....1....2....5...-1...-3....4....3...-3....4....4....2
%e ..3...-4...-2...-5....4....2....2....4...-1...-5...-4....2....4...-5...-2...-1
%e .-2...-2....1....5....5...-5...-2...-3....2....4...-5...-2....2...-3...-1...-5
%e .-2....1....2....5....5...-4...-5...-3....3....2...-5...-5...-5...-5...-2...-2
%K nonn
%O 1,2
%A _R. H. Hardin_ Apr 23 2011