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A208967 Number of n-bead necklaces labeled with numbers -5..5 allowing reversal, with sum zero and first and second differences in -5..5. 0
1, 2, 2, 11, 40, 221, 1185, 6883, 39143, 224991, 1299553, 7598452, 44893012, 267934513 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Column 5 of A208970.

LINKS

Table of n, a(n) for n=1..14.

EXAMPLE

Some solutions for n=5:

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

..0...-1...-1....0...-1...-2...-1...-1....0....0...-2....0...-1...-2...-1...-2

.-1....2....0....2....1...-2....0....2....0....1....1....0...-1....1....1....2

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

..1....0....0....1....1....3....2....0....0....0....1....0....2....2....0....1

CROSSREFS

Sequence in context: A090527 A014220 A089544 * A192824 A184237 A069648

Adjacent sequences:  A208964 A208965 A208966 * A208968 A208969 A208970

KEYWORD

nonn

AUTHOR

R. H. Hardin, Mar 03 2012

STATUS

approved

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Last modified September 20 04:06 EDT 2019. Contains 327212 sequences. (Running on oeis4.)