A188179 Number of strictly increasing arrangements of n numbers in -(n+5)..(n+5) with sum zero

1, 7, 32, 150, 649, 2739, 11322, 46029, 184717, 734517, 2900900, 11396054, 44585180, 173885716, 676537634, 2627337510, 10188889502, 39470938574, 152787805216, 591094837268, 2285918145819, 8838165075791, 34167434076214, 132084761317107

Offset

1,2

Comments

Column 7 of A188181

Links

R. H. Hardin, Table of n, a(n) for n = 1..26

Example

Some solutions for n=5
.-4...-9...-9...-8...-7...-7..-10...-7..-10..-10...-9...-9..-10...-9...-6...-7
.-3...-7...-5...-5...-3...-3...-5...-3....0...-8...-4...-3...-7...-4...-2...-2
.-1....0...-2...-3....2...-1....2....1....1....2....1....0....3...-2....0....0
..0....7....7....7....3....3....4....3....4....6....5....2....4....5....3....2
..8....9....9....9....5....8....9....6....5...10....7...10...10...10....5....7

Crossrefs

Sequence in context: A034360 A268745 A199845 * A050148 A188208 A302995

Adjacent sequences: A188176 A188177 A188178 * A188180 A188181 A188182

Keyword

nonn

Author

R. H. Hardin Mar 23 2011

Status

approved