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A199708 Number of -n..n arrays x(0..5) of 6 elements with zero sum and no two neighbors equal 3
32, 708, 4964, 20116, 59992, 147072, 314532, 608420, 1089752, 1836600, 2946204, 4537152, 6751384, 9756388, 13747296, 18948952, 25618064, 34045344, 44557532, 57519592, 73336788, 92456792, 115371796, 142620672, 174790996, 212521224 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Row 6 of A199704

LINKS

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

FORMULA

Empirical: a(n)=3*a(n-1)-2*a(n-2)-a(n-3)+2*a(n-5)-a(n-6)-a(n-7)+2*a(n-8)-a(n-10)-2*a(n-11)+3*a(n-12)-a(n-13)

EXAMPLE

Some solutions for n=5

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

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

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

.-5....2...-1....2....3...-1....1...-2....5...-5....5....5...-1...-3....1....2

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

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

CROSSREFS

Sequence in context: A025008 A020984 A247997 * A264093 A062261 A060624

Adjacent sequences:  A199705 A199706 A199707 * A199709 A199710 A199711

KEYWORD

nonn

AUTHOR

R. H. Hardin Nov 09 2011

STATUS

approved

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Last modified July 18 21:25 EDT 2019. Contains 325144 sequences. (Running on oeis4.)