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A200428 Number of -6..6 arrays x(0..n+2) of n+3 elements with zero sum and no two or three adjacent elements summing to zero 1
940, 10250, 98052, 955602, 10217182, 111101654, 1206988576, 13090995142, 142480007436, 1556876199472, 17066756670292, 187540784116604, 2065041046363200, 22780124416681858, 251710751862388016 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 6 of A200430

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..64

EXAMPLE

Some solutions for n=3

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

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

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

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

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

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

CROSSREFS

Sequence in context: A031902 A204072 A259641 * A104917 A052238 A158718

Adjacent sequences:  A200425 A200426 A200427 * A200429 A200430 A200431

KEYWORD

nonn

AUTHOR

R. H. Hardin Nov 17 2011

STATUS

approved

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Last modified June 18 04:41 EDT 2021. Contains 345098 sequences. (Running on oeis4.)