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A209071 Number of n-bead necklaces labeled with numbers -6..6 not allowing reversal, with sum zero and avoiding the pattern z z+1 z+2. 0

%I #8 Sep 03 2022 23:04:54

%S 1,7,42,366,3378,33469,344618,3660116,39772437,440146892,4943305065,

%T 56200679500,645543627296

%N Number of n-bead necklaces labeled with numbers -6..6 not allowing reversal, with sum zero and avoiding the pattern z z+1 z+2.

%C Column 6 of A209073.

%e Some solutions for n=6:

%e .-4...-5...-3...-5...-6...-5...-4...-6...-5...-4...-5...-6...-4...-5...-4...-1

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

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

%e ..4...-4...-1....2....4....4....0....0...-2....4...-3...-6....6....2....1....1

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

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

%Y Cf. A209073.

%K nonn

%O 1,2

%A _R. H. Hardin_, Mar 04 2012

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Last modified April 26 01:44 EDT 2024. Contains 371989 sequences. (Running on oeis4.)