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

1,1

Comments

Row 8 of A187988

Links

Table of n, a(n) for n=1..40.

Example

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

Sequence in context: A325883 A237445 A122421 * A151722 A250148 A068280

Adjacent sequences: A187989 A187990 A187991 * A187993 A187994 A187995

Keyword

nonn

Author

R. H. Hardin Mar 18 2011

Extensions

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

Status

approved