A189502 Number of arrangements of 6 nonzero numbers x(i) in -n..n with the sum of floor(x(i)/x(i+1)) equal to zero

0, 550, 4920, 24806, 85480, 238836, 567774, 1218778, 2397016, 4388664, 7630748, 12628448, 20067182, 30962660, 46263140, 67394664, 96114728, 134386478, 184598554, 249470222, 331776594, 436360316, 567697448, 729535354, 926393324

Offset

1,2

Comments

Row 5 of A189498

Links

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

Example

Some solutions for n=5
..1....4...-1...-1....1....4....1....3....1...-2...-3....5...-1....5....1....3
.-2....5...-5...-3....5....1...-1...-2...-1...-1...-3...-5...-3...-5...-5...-2
.-2....3....5....2....5...-3...-4...-3....4....1....5...-4...-4...-2...-3....3
.-1...-3....5....2...-4...-3...-3...-2....1...-5...-5....3...-5...-5...-2....1
..2...-3....3...-2...-2....1...-3...-1....5...-5....3....1...-3....4....4...-5
.-2....5...-4...-1....5...-3....5....4...-4....5....1...-5....5....3....5...-5

Crossrefs

Sequence in context: A232314 A141547 A236723 * A190075 A234415 A285925

Adjacent sequences: A189499 A189500 A189501 * A189503 A189504 A189505

Keyword

nonn

Author

R. H. Hardin Apr 23 2011

Status

approved