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A189549 Number of arrangements of 6 nonzero numbers x(i) in -n..n with the sum of trunc(x(i)/x(i+1)) equal to zero 1
0, 552, 5416, 26804, 97836, 274132, 683144, 1481908, 2937048, 5414876, 9605792, 15831096, 25469448, 39609448, 59492044, 86819652, 124912364, 174698948, 241615316, 327281004, 436632904, 575430892, 752423588, 965700832, 1230962864 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Row 5 of A189545

LINKS

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

EXAMPLE

Some solutions for n=5

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

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

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

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

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

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

CROSSREFS

Sequence in context: A014360 A158636 A251161 * A282595 A290048 A023914

Adjacent sequences:  A189546 A189547 A189548 * A189550 A189551 A189552

KEYWORD

nonn

AUTHOR

R. H. Hardin Apr 23 2011

STATUS

approved

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Last modified March 19 11:10 EDT 2019. Contains 321329 sequences. (Running on oeis4.)