A183934 Number of nondecreasing arrangements of n numbers in -8..8 with sum zero and sum of squares less than n*72/3

1, 5, 24, 110, 408, 1324, 3931, 10781, 27652, 66846, 153536, 336714, 709053, 1439910, 2828356, 5391328, 10000100, 18088003, 31970349, 55317387, 93839420, 156294086, 255908082, 412365724, 654618675, 1024726981, 1583050748, 2415379762

Offset

1,2

Comments

Column 8 of A183935

Links

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

Example

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

Crossrefs

Sequence in context: A291010 A063001 A000953 * A171310 A225116 A367819

Adjacent sequences: A183931 A183932 A183933 * A183935 A183936 A183937

Keyword

nonn

Author

R. H. Hardin Jan 08 2011

Status

approved