A189541 Number of arrangements of n+1 nonzero numbers x(i) in -5..5 with the sum of trunc(x(i)/x(i+1)) equal to zero

40, 152, 1340, 11276, 97836, 911144, 8485264, 80270588, 762015216, 7245223968, 69300586592, 665123270568, 6402235178628, 61805759252168, 598018355467584, 5798061848435388, 56317251524412720, 547885648488675312

Offset

1,1

Comments

Column 5 of A189545

Links

R. H. Hardin, Table of n, a(n) for n = 1..156

Example

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

Crossrefs

Sequence in context: A233733 A233726 A100766 * A201233 A135848 A089548

Adjacent sequences: A189538 A189539 A189540 * A189542 A189543 A189544

Keyword

nonn

Author

R. H. Hardin Apr 23 2011

Status

approved