A187992 Number of nondecreasing arrangements of 8 numbers x(i) in -(n+6)..(n+6) with the sum of sign(x(i))*2^|x(i)| zero.

1452, 2199, 3158, 4357, 5825, 7592, 9689, 12148, 15002, 18285, 22032, 26279, 31063, 36422, 42395, 49022, 56344, 64403, 73242, 82905, 93437, 104884, 117293, 130712, 145190, 160777, 177524, 195483, 214707, 235250, 257167, 280514, 305348, 331727, 359710, 389357, 420729, 453888, 488897, 525820

Offset: 1

Author

R. H. Hardin, Mar 18 2011

Keywords

• nonn

Examples

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

Crossrefs

Row 8 of A187988.

Extensions

More terms from R. J. Mathar, May 11 2023