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A199528 Number of -6..6 arrays x(0..n-1) of n elements with zero sum and no two consecutive zero elements 1
1, 12, 126, 1432, 16682, 197962, 2378412, 28844590, 352355640, 4329146404, 53439881140, 662256127274, 8234161234932, 102668802658902, 1283270183281782, 16074009129375488, 201718956009659774, 2535677513896048744 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Column 6 of A199530

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..200

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

Sequence in context: A101602 A264896 A062199 * A124797 A204768 A045508

Adjacent sequences:  A199525 A199526 A199527 * A199529 A199530 A199531

KEYWORD

nonn

AUTHOR

R. H. Hardin Nov 07 2011

STATUS

approved

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Last modified October 22 19:53 EDT 2019. Contains 328319 sequences. (Running on oeis4.)