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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
12, 136, 928, 3388, 9394, 22088, 45892, 86416, 152136, 251964, 400562, 608572, 895302, 1288110, 1800136, 2460254, 3306706, 4375254, 5709802, 7332744, 9299616, 11690792, 14567750, 17952362, 21909788, 26581910, 32027018, 38302012, 45552824 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Row 4 of A189498

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..200

EXAMPLE

Some solutions for n=5

..4...-1...-2....5...-4....2....2...-1...-4...-1....2...-3...-5...-1....5....1

..4...-2....2....2....3...-5...-5....3...-1....5...-2....5....4....3....5...-4

.-5....3....3....2....2....5...-5....5....4....3...-5....3...-4...-3....2....4

.-3....5....5...-5...-2...-4....4....2...-2....2....3...-2...-4...-4...-1....2

..3....4....3....4...-1...-1....2...-3....2...-2....1...-1...-2...-2....2....3

CROSSREFS

Sequence in context: A290474 A030023 A194013 * A216081 A264503 A000467

Adjacent sequences:  A189498 A189499 A189500 * A189502 A189503 A189504

KEYWORD

nonn

AUTHOR

R. H. Hardin Apr 23 2011

STATUS

approved

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Last modified December 2 14:09 EST 2021. Contains 349445 sequences. (Running on oeis4.)