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A188332 Number of nondecreasing arrangements of n nonzero numbers in -(n+6)..(n+6) with sum zero 1
0, 8, 40, 257, 1534, 9314, 56314, 341988, 2082546, 12729304, 78083158, 480688451, 2969319278, 18402445258, 114405090020, 713334999381, 4460132045862, 27960102769656, 175711836643538, 1106809365488500, 6987092970919342 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Column 8 of A188333

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..25

EXAMPLE

Some solutions for n=6

.-6..-11...-7...-9..-11..-10...-6...-9..-11..-12...-4...-3..-12...-8..-10..-10

.-6..-11...-4...-6...-9...-9...-6...-4...-4...-5...-3...-2..-11...-7..-10...-7

.-4...-5...-2...-6...-9...-1...-1...-4....1...-2...-3...-2...-3...-3...-2...-6

..2....7...-2...-3....9....4...-1...-1....1...-2...-1....1....7....2....5....4

..4....9....5...12....9....4....5....7....4...10...-1....3....7....4....7....9

.10...11...10...12...11...12....9...11....9...11...12....3...12...12...10...10

CROSSREFS

Sequence in context: A068774 A073955 A264332 * A158922 A117083 A007987

Adjacent sequences:  A188329 A188330 A188331 * A188333 A188334 A188335

KEYWORD

nonn

AUTHOR

R. H. Hardin Mar 28 2011

STATUS

approved

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Last modified November 16 21:47 EST 2018. Contains 317275 sequences. (Running on oeis4.)