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A189505 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 1
140, 26816, 852940, 10077438, 67449574, 326423068, 1218634086, 3870426602, 10678039872, 26541186546, 60515390904, 129217908546, 258501393812, 493822993858, 903540678414, 1589111278140, 2702453254684, 4467233004764 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Row 8 of A189498

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..58

EXAMPLE

Some solutions for n=5

.-5...-5...-5...-5...-5...-5...-5...-5...-5...-5...-5...-5...-5...-5...-5...-5

.-5...-5...-5...-5...-5...-5...-5...-5...-5...-5...-5...-5...-5...-5...-5...-5

.-4...-5...-5...-5...-5...-5...-5...-5...-5...-5...-5...-5...-5...-5...-4...-5

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

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

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

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

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

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

CROSSREFS

Sequence in context: A159362 A188255 A159366 * A190078 A091755 A189552

Adjacent sequences:  A189502 A189503 A189504 * A189506 A189507 A189508

KEYWORD

nonn

AUTHOR

R. H. Hardin Apr 23 2011

STATUS

approved

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Last modified December 8 03:17 EST 2021. Contains 349590 sequences. (Running on oeis4.)