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A188325 Number of nondecreasing arrangements of n nonzero numbers in -(n-1)..(n-1) with sum zero 1
0, 1, 2, 10, 40, 197, 980, 5142, 27632, 152191, 853564, 4863492, 28075992, 163920550, 966421928, 5746596806, 34428962746, 207654949801, 1259963104618, 7686160299232, 47116518171284, 290105437233107, 1793451033655758 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

COMMENTS

Column 1 of A188333

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..32

EXAMPLE

Some solutions for n=6

.-5...-4...-5...-4...-4...-4...-5...-4...-4...-3...-5...-5...-5...-2...-5...-2

.-3...-2...-4...-2...-4...-2...-3...-2...-3...-2...-1...-4...-3...-2...-3...-2

.-1....1....1...-1...-1....1....2...-1....1...-1...-1...-4...-3...-2...-1...-2

..1....1....2....2....1....1....2...-1....1...-1....1....3....1...-2....1...-1

..3....2....2....2....3....1....2....3....1....3....2....5....5....4....4....2

..5....2....4....3....5....3....2....5....4....4....4....5....5....4....4....5

CROSSREFS

Sequence in context: A030534 A151026 A151027 * A151028 A282619 A080252

Adjacent sequences:  A188322 A188323 A188324 * A188326 A188327 A188328

KEYWORD

nonn

AUTHOR

R. H. Hardin Mar 28 2011

STATUS

approved

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Last modified September 15 04:28 EDT 2019. Contains 327062 sequences. (Running on oeis4.)