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A201437 Number of zero-sum -6..6 arrays of n elements with first through fourth differences also in -6..6 1
1, 7, 47, 217, 837, 3067, 11591, 46521, 189527, 794867, 3212411, 13228131, 54776691, 227656973, 950625037, 3969330087, 16629156327, 69823182357, 293680456429, 1237245364673, 5218020323041, 22034867606649, 93154330773015 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Column 6 of A201439

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..72

EXAMPLE

Some solutions for n=8

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

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

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

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

..0....4....1...-1...-1....1....3...-2...-1....2...-1....4....2....0....1....4

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

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

.-2...-6....1....0....5....5...-6...-2....5....0...-6...-2...-2....2...-2...-2

CROSSREFS

Sequence in context: A167860 A152988 A336789 * A202509 A009202 A093112

Adjacent sequences:  A201434 A201435 A201436 * A201438 A201439 A201440

KEYWORD

nonn

AUTHOR

R. H. Hardin Dec 01 2011

STATUS

approved

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Last modified August 4 19:03 EDT 2021. Contains 346455 sequences. (Running on oeis4.)