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A183915 Number of nondecreasing arrangements of n numbers in -7..7 with sum zero 2
1, 8, 32, 126, 414, 1242, 3370, 8512, 20094, 44916, 95514, 194668, 381676, 723354, 1328980, 2374753, 4136477, 7040196, 11728606, 19159798, 30734578, 48479188, 75277670, 115195490, 173885716, 259140928, 381577586, 555546058, 800247348 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
COMMENTS
Column 7 of A183917
LINKS
EXAMPLE
Some solutions for n=4
.-6...-6...-4...-2...-3...-5...-7...-6...-3...-5...-5...-2...-3...-1...-7...-2
.-2...-1...-4...-2...-1...-3....0...-3...-1...-2...-1....0...-2...-1...-7...-2
..2....0....4....0....1....4....0....4....2....3....3....1....1....0....7....1
..6....7....4....4....3....4....7....5....2....4....3....1....4....2....7....3
CROSSREFS
Sequence in context: A196097 A234272 A269077 * A357789 A363333 A358253
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 07 2011
STATUS
approved

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Last modified April 15 05:27 EDT 2024. Contains 371667 sequences. (Running on oeis4.)