%I #5 Mar 31 2012 12:36:15
%S 140,26816,852940,10077438,67449574,326423068,1218634086,3870426602,
%T 10678039872,26541186546,60515390904,129217908546,258501393812,
%U 493822993858,903540678414,1589111278140,2702453254684,4467233004764
%N Number of arrangements of 9 nonzero numbers x(i) in -n..n with the sum of floor(x(i)/x(i+1)) equal to zero
%C Row 8 of A189498
%H R. H. Hardin, <a href="/A189505/b189505.txt">Table of n, a(n) for n = 1..58</a>
%e Some solutions for n=5
%e .-5...-5...-5...-5...-5...-5...-5...-5...-5...-5...-5...-5...-5...-5...-5...-5
%e .-5...-5...-5...-5...-5...-5...-5...-5...-5...-5...-5...-5...-5...-5...-5...-5
%e .-4...-5...-5...-5...-5...-5...-5...-5...-5...-5...-5...-5...-5...-5...-4...-5
%e .-5....3....4....1...-1....3...-1....3...-4....2....5...-4...-1....3...-3....4
%e .-2....2....5...-1...-5...-5....1....3...-5...-3...-4...-4....1....3...-2....4
%e ..4....5...-3...-1....4...-4...-5...-4....5...-2...-5...-3....4...-5....3...-3
%e .-1....5...-2....4...-2....3....2....3....2...-1...-2....3....5....4....3....3
%e ..2...-5...-5....2....5....5...-2...-3...-5...-2...-5...-1...-1....3...-5....1
%e ..1....5...-5....1...-4....2....4...-1....2....2....5....3....1....2....2...-1
%K nonn
%O 1,1
%A _R. H. Hardin_ Apr 23 2011
|