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A209004
Number of n-bead necklaces labeled with numbers -5..5 not allowing reversal, with sum zero and first and second differences in -5..5.
0
1, 2, 3, 16, 71, 409, 2313, 13561, 77953, 448820, 2597203, 15189895, 89774431, 535825715
OFFSET
1,2
COMMENTS
Column 5 of A209007.
EXAMPLE
Some solutions for n=6:
.-3...-1...-4...-3...-3...-3...-3...-2...-4...-2...-2...-3...-2...-4...-4...-4
..0...-1...-2...-3...-3...-3...-2....0...-2....0...-1...-3....0...-3...-1...-1
..3...-1....3....2....0....0....1....2....1....0....0....2....1...-1....2....0
..1....0....3....2....3....4....0...-1....4....1....0....3....0....4....3....4
..0....1....2....2....3....3....3....0....2....2....2....0....1....4....2....3
.-1....2...-2....0....0...-1....1....1...-1...-1....1....1....0....0...-2...-2
CROSSREFS
Sequence in context: A355229 A052858 A191416 * A329121 A368765 A073997
KEYWORD
nonn
AUTHOR
R. H. Hardin, Mar 04 2012
STATUS
approved