cp's OEIS Frontend

A189502 Number of arrangements of 6 nonzero numbers x(i) in -n..n with the sum of floor(x(i)/x(i+1)) equal to zero.

%I A189502 #7 Jul 22 2025 11:47:44
%S A189502 0,550,4920,24806,85480,238836,567774,1218778,2397016,4388664,7630748,
%T A189502 12628448,20067182,30962660,46263140,67394664,96114728,134386478,
%U A189502 184598554,249470222,331776594,436360316,567697448,729535354,926393324
%N A189502 Number of arrangements of 6 nonzero numbers x(i) in -n..n with the sum of floor(x(i)/x(i+1)) equal to zero.
%C A189502 Row 5 of A189498
%H A189502 R. H. Hardin, <a href="/A189502/b189502.txt">Table of n, a(n) for n = 1..200</a>
%e A189502 Some solutions for n=5
%e A189502 ..1....4...-1...-1....1....4....1....3....1...-2...-3....5...-1....5....1....3
%e A189502 .-2....5...-5...-3....5....1...-1...-2...-1...-1...-3...-5...-3...-5...-5...-2
%e A189502 .-2....3....5....2....5...-3...-4...-3....4....1....5...-4...-4...-2...-3....3
%e A189502 .-1...-3....5....2...-4...-3...-3...-2....1...-5...-5....3...-5...-5...-2....1
%e A189502 ..2...-3....3...-2...-2....1...-3...-1....5...-5....3....1...-3....4....4...-5
%e A189502 .-2....5...-4...-1....5...-3....5....4...-4....5....1...-5....5....3....5...-5
%K A189502 nonn
%O A189502 1,2
%A A189502 _R. H. Hardin_ Apr 23 2011