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 A189501 Number of arrangements of 5 nonzero numbers x(i) in -n..n with the sum of floor(x(i)/x(i+1)) equal to zero 1

%I

%S 12,136,928,3388,9394,22088,45892,86416,152136,251964,400562,608572,

%T 895302,1288110,1800136,2460254,3306706,4375254,5709802,7332744,

%U 9299616,11690792,14567750,17952362,21909788,26581910,32027018,38302012,45552824

%N Number of arrangements of 5 nonzero numbers x(i) in -n..n with the sum of floor(x(i)/x(i+1)) equal to zero

%C Row 4 of A189498

%H R. H. Hardin, <a href="/A189501/b189501.txt">Table of n, a(n) for n = 1..200</a>

%e Some solutions for n=5

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

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Apr 23 2011

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Last modified January 27 23:41 EST 2022. Contains 350654 sequences. (Running on oeis4.)