A188008 Number of nondecreasing arrangements of 8 numbers x(i) in -(n+6)..(n+6) with the sum of sign(x(i))*x(i)^2 zero

1670, 2983, 5191, 8373, 13343, 20224, 30358, 43750, 62354, 86173, 118859, 159445, 213459, 277174, 362216, 461894, 590268, 739245, 924861, 1139511, 1409109, 1712354, 2087342, 2501092, 3011962, 3576355, 4267359, 5020859, 5914551, 6899802

Offset

1,1

Comments

Row 8 of A188002

Links

R. H. Hardin, Table of n, a(n) for n = 1..31

Example

Some solutions for n=3
.-5...-8...-6...-9...-6...-8...-6...-4...-6...-7...-6...-8...-8...-6...-8...-7
.-4...-7...-6...-6...-2...-8...-6...-4...-5...-6...-3...-8...-7...-6...-8...-6
.-4...-4...-3...-2...-2...-2...-6...-4...-1...-2...-3....0...-6...-4...-4...-3
.-1....2...-3...-2...-1....0....0...-1....1...-2...-2....1...-2....1...-1...-2
.-1....3....2...-2....0....0....2....0....2....2...-1....1...-1....2....3....3
..1....4....5...-1....2....2....2....0....4....2....3....3....3....3....6....3
..3....6....5....7....4....8....6....0....4....2....5....6....8....5....6....4
..7....8....6....9....5....8....8....7....5....9....5....9....9....7....8....8

Crossrefs

Sequence in context: A216590 A098974 A109564 * A145755 A252300 A339960

Adjacent sequences: A188005 A188006 A188007 * A188009 A188010 A188011

Keyword

nonn

Author

R. H. Hardin Mar 18 2011

Status

approved