A189503 Number of arrangements of 7 nonzero numbers x(i) in -n..n with the sum of floor(x(i)/x(i+1)) equal to zero

40, 1892, 27508, 182634, 787412, 2642358, 7269852, 17692662, 38791846, 78583484, 149461616, 269390980, 462294730, 765448244, 1224516760, 1898713570, 2870678078, 4243248920, 6141093956, 8731426052, 12179866066, 16758644852

Offset

1,1

Comments

Row 6 of A189498

Links

R. H. Hardin, Table of n, a(n) for n = 1..143

Example

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

Crossrefs

Sequence in context: A190926 A143314 A308836 * A190076 A278729 A189550

Adjacent sequences: A189500 A189501 A189502 * A189504 A189505 A189506

Keyword

nonn

Author

R. H. Hardin Apr 23 2011

Status

approved