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A188178 Number of strictly increasing arrangements of n numbers in -(n+4)..(n+4) with sum zero 1
1, 6, 25, 104, 414, 1636, 6375, 24591, 94257, 360002, 1371535, 5216252, 19819846, 75277670, 285893124, 1085984406, 4126777398, 15690144942, 59691687518, 227248928264, 865788366806, 3301087870766, 12596381911969, 48104063936789 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Column 6 of A188181

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..27

EXAMPLE

Some solutions for n=5

.-7...-4...-9...-9...-8...-8...-6...-6...-7...-5...-7...-9...-5...-9...-9...-5

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

..0....0....2....3....1...-3...-2....0....0...-1...-3....0....0....2...-2....0

..5....1....4....5....2....8....4....3....5....4....6....3....3....4....7....4

..7....5....5....7....9....9....8....8....8....5....8....7....5....8....9....5

CROSSREFS

Sequence in context: A199844 A267536 A029871 * A147543 A212258 A048875

Adjacent sequences:  A188175 A188176 A188177 * A188179 A188180 A188181

KEYWORD

nonn

AUTHOR

R. H. Hardin Mar 23 2011

STATUS

approved

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Last modified October 22 15:40 EDT 2021. Contains 348172 sequences. (Running on oeis4.)