A183926 Number of nondecreasing arrangements of n numbers in -8..8 with sum zero and sum of squares not greater than n*72/3

1, 5, 25, 112, 414, 1346, 3998, 10966, 28096, 67867, 155632, 341105, 717922, 1456768, 2859956, 5449503, 10102778, 18266557, 32275332, 55823589, 94667487, 157629696, 258017192, 415654482, 659686930, 1032410595, 1594572418, 2432482107

Offset

1,2

Comments

Column 8 of A183927

Links

R. H. Hardin, Table of n, a(n) for n = 1..59

Example

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

Crossrefs

Sequence in context: A282085 A290920 A267228 * A092440 A196985 A124534

Adjacent sequences: A183923 A183924 A183925 * A183927 A183928 A183929

Keyword

nonn

Author

R. H. Hardin Jan 08 2011

Status

approved