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A188233 Number of nondecreasing arrangements of n numbers in -(n+4)..(n+4) with sum zero and not more than two numbers equal 1
1, 7, 31, 172, 903, 4859, 26123, 141519, 769915, 4209720, 23118268, 127495912, 705885128, 3922515554, 21871461990, 122341995397, 686381562245, 3861568338064, 21781724157952, 123162942539680, 698010289536681 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Column 6 of A188236

LINKS

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

EXAMPLE

Some solutions for n=4

.-7...-3...-4...-6...-5...-7...-3...-4...-8...-8...-3...-6...-7...-8...-8...-6

.-5...-1...-2...-2...-5....1...-3...-4...-3...-3...-2....0...-4...-5...-6...-5

..5....1....1....1....4....2....1....0....3....5....2....0....4....6....7....4

..7....3....5....7....6....4....5....8....8....6....3....6....7....7....7....7

CROSSREFS

Sequence in context: A057620 A055625 A102239 * A319457 A264608 A208446

Adjacent sequences:  A188230 A188231 A188232 * A188234 A188235 A188236

KEYWORD

nonn

AUTHOR

R. H. Hardin Mar 24 2011

STATUS

approved

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Last modified October 23 04:06 EDT 2021. Contains 348211 sequences. (Running on oeis4.)