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%I #6 Mar 12 2017 23:23:30
%S 1,5,20,122,766,5238,37044,270832,2024738,15417296,119124324,
%T 931714740,7362145488,58683599062,471302764880
%N Number of n-bead necklaces labeled with numbers -4..4 not allowing reversal, with sum zero with no three beads in a row equal.
%C Column 4 of A208945.
%e Some solutions for n=5:
%e .-2...-4...-4...-4...-3...-2...-4...-4...-2...-4...-2...-3...-3...-3...-4...-2
%e .-2....1....2....3....4....3....4....0...-2...-2...-2....0...-3....3...-1...-1
%e ..0....2...-2...-2...-1....0...-1....3....0....3....1....2....0....0....2....3
%e ..1....3....2....1....1...-1....2....2....2....0....1...-1....2...-1....0...-2
%e ..3...-2....2....2...-1....0...-1...-1....2....3....2....2....4....1....3....2
%K nonn
%O 1,2
%A _R. H. Hardin_, Mar 03 2012