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 A189504 Number of arrangements of 8 nonzero numbers x(i) in -n..n with the sum of floor(x(i)/x(i+1)) equal to zero 1

%I #5 Mar 31 2012 12:36:15

%S 0,7384,152358,1350418,7250142,29261538,93830584,260746932,640437244,

%T 1434950142,2985187290,5855131794,10847051914,19293465580,33015900952,

%U 54518107984,87418596734,136633143572,208413957692,311534423834

%N Number of arrangements of 8 nonzero numbers x(i) in -n..n with the sum of floor(x(i)/x(i+1)) equal to zero

%C Row 7 of A189498

%H R. H. Hardin, <a href="/A189504/b189504.txt">Table of n, a(n) for n = 1..90</a>

%e Some solutions for n=5

%e .-5...-4...-5...-5...-5...-5...-5...-4...-5...-5...-5...-4...-5...-5...-4...-5

%e .-5...-5...-5...-5...-5...-5...-5...-5...-5...-5...-5...-5...-5...-5...-5...-5

%e ..2...-4....5...-3...-4...-2...-3...-3...-5...-2...-4...-4....2...-2...-5...-5

%e .-4....4....5....3....5....3...-4...-4....1...-5....3....3....1...-4....2...-4

%e .-2...-5....3...-4....1...-5....2...-1....4....5....1....2....1...-2...-2...-4

%e ..4...-2....5....3...-1...-2....5....5....3...-3...-4...-1...-2....5...-1...-4

%e ..5....1...-5....3....4....1....4...-2....1....4....5...-5...-3...-5...-2....4

%e ..2....1....5....2...-1...-4...-4....5...-1....4...-5...-2...-5....2...-2...-1

%K nonn

%O 1,2

%A _R. H. Hardin_ Apr 23 2011

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Last modified April 14 03:22 EDT 2024. Contains 371652 sequences. (Running on oeis4.)