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A208822 Number of n-bead necklaces labeled with numbers -5..5 allowing reversal, with sum zero. 0

%I #8 Apr 21 2021 13:12:31

%S 1,6,18,131,905,7582,65134,587682,5416897,50959134,486441796,

%T 4701644087,45911470685

%N Number of n-bead necklaces labeled with numbers -5..5 allowing reversal, with sum zero.

%C Column 5 of A208825.

%e Some solutions for n=3:

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

%e ..0...-2...-1....0....2...-1....1....1...-1....0....0....2...-2...-1....1....0

%e ..2....4....3....3....3....4....1....4....5....4....0....2....5....2....3....5

%Y Cf. A208825.

%K nonn

%O 1,2

%A _R. H. Hardin_, Mar 01 2012

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Last modified April 13 16:05 EDT 2024. Contains 371644 sequences. (Running on oeis4.)