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A183933 Number of nondecreasing arrangements of n numbers in -7..7 with sum zero and sum of squares less than n*56/3 1
1, 5, 20, 83, 262, 777, 2117, 5278, 12353, 27893, 58831, 118985, 235504, 443653, 810431, 1459822, 2529977, 4285656, 7192569, 11698167, 18689016, 29678739, 45907880, 70000817, 106315189, 157902365, 231761845, 339336920, 487306673 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Column 7 of A183935

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..63

EXAMPLE

Some solutions for n=4

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

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

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

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

CROSSREFS

Sequence in context: A165203 A249946 A030520 * A323262 A295601 A301946

Adjacent sequences:  A183930 A183931 A183932 * A183934 A183935 A183936

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 08 2011

STATUS

approved

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Last modified August 4 14:36 EDT 2021. Contains 346447 sequences. (Running on oeis4.)