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%I
%S 1,8,56,563,6004,68722,817362,10024344,125779236,1607175818,
%T 20840635620,273560222248
%N Number of n-bead necklaces labeled with numbers -7..7 not allowing reversal, with sum zero with no three beads in a row equal.
%C Column 7 of A208945.
%e Some solutions for n=5:
%e .-4...-6...-7...-7...-4...-3...-6...-6...-6...-6...-3...-7...-5...-6...-5...-4
%e .-2...-1...-1....4...-3...-3....5...-5....6....7...-3...-6...-4...-6...-2...-2
%e .-3....7....6...-2....5....0....2....6....3...-2....2....2....3....1....4....5
%e ..4...-3....4....4....3....2....3....3....1...-5...-2....5....5....6....3....1
%e ..5....3...-2....1...-1....4...-4....2...-4....6....6....6....1....5....0....0
%Y Cf. A208945.
%K nonn
%O 1,2
%A _R. H. Hardin_, Mar 03 2012
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