A189548 Number of arrangements of 5 nonzero numbers x(i) in -n..n with the sum of trunc(x(i)/x(i+1)) equal to zero

12, 152, 964, 3664, 11276, 26152, 56440, 107464, 192680, 320940, 519728, 785056, 1168104, 1680672, 2360220, 3236220, 4391472, 5806664, 7616720, 9805592, 12492388, 15716184, 19660824, 24190984, 29641876, 35992732, 43442168, 51971748

Offset

1,1

Comments

Row 4 of A189545

Links

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

Example

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

Crossrefs

Sequence in context: A015611 A127650 A286432 * A103759 A351526 A121195

Adjacent sequences: A189545 A189546 A189547 * A189549 A189550 A189551

Keyword

nonn

Author

R. H. Hardin Apr 23 2011

Status

approved