A189494 Number of arrangements of n+1 nonzero numbers x(i) in -5..5 with the sum of floor(x(i)/x(i+1)) equal to zero

20, 148, 1088, 9394, 85480, 787412, 7250142, 67449574, 630466648, 5926141678, 55929815964, 529724228140, 5032227826544, 47929965246944, 457554555905322, 4376712118553570, 41939283915535994, 402511337790992824

Offset

1,1

Comments

Column 5 of A189498

Links

R. H. Hardin, Table of n, a(n) for n = 1..139

Example

Some solutions for n=6
.-2....1....1....1....2...-4...-2...-4...-3....1...-4...-2...-3...-3....2...-2
.-5...-5...-4...-5...-5...-5...-5...-5...-4...-4...-4...-5...-4...-5...-4...-4
.-1...-2....4...-1...-3...-5...-5...-3....4...-1....2...-4....4...-4...-2...-1
.-3...-2....5...-4....3....4...-1....3...-3....1....4....2...-3....3....5....3
..1...-5....1....5...-4....2....5....1...-2....4....3....5...-4....3...-3...-4
.-1...-3...-2...-3...-3....3...-2...-5...-1....5....3....3...-1....4...-5....4
..4....1....1....4...-3...-4....1....4...-2...-4...-4....4....2....5...-2...-5

Crossrefs

Sequence in context: A183959 A094171 A100190 * A022680 A108647 A164605

Adjacent sequences: A189491 A189492 A189493 * A189495 A189496 A189497

Keyword

nonn

Author

R. H. Hardin Apr 23 2011

Status

approved