A189497 Number of arrangements of n+1 nonzero numbers x(i) in -8..8 with the sum of floor(x(i)/x(i+1)) equal to zero

56, 554, 6474, 86416, 1218778, 17692662, 260746932, 3870426602, 57837221756, 869215927390, 13123761537778, 198920666858552, 3025059739988546, 46133139520964090, 705259604715611042, 10804567651956071366

Offset

1,1

Comments

Column 8 of A189498

Links

R. H. Hardin, Table of n, a(n) for n = 1..78

Example

Some solutions for n=5
..7...-8....1....8....1....1....2....5...-5...-7...-1...-1...-7....6....7...-6
.-8...-8...-8...-8...-8...-8...-8...-8...-8...-8...-8...-8...-8...-8...-8...-6
.-6...-2....8...-7....4...-6...-3...-8...-1....2...-2....5....5...-6...-3....3
.-5...-6....8...-5....1...-4....3...-4....6....1....1...-7....3....3...-3....2
..5....1....4...-8....5....4....7....4...-6....8....4...-2....7....1....6...-2
..7....1...-5....8...-7....5....8...-7....1....3...-2...-6....5...-1...-7...-2

Crossrefs

Sequence in context: A220209 A276565 A048540 * A219712 A244429 A005931

Adjacent sequences: A189494 A189495 A189496 * A189498 A189499 A189500

Keyword

nonn

Author

R. H. Hardin Apr 23 2011

Status

approved