|
%I #6 Mar 12 2017 23:17:05
%S 1,4,8,38,155,828,4390,25202,146803,878708,5330524,32785934,203687695,
%T 1276913732,8065359582,51282069040
%N Number of n-bead necklaces labeled with numbers -3..3 allowing reversal, with sum zero.
%C Column 3 of A208825.
%e All solutions for n=3:
%e .-2....0...-2...-3...-1...-3...-1...-2
%e .-1....0....1....1...-1....0....0....0
%e ..3....0....1....2....2....3....1....2
%K nonn
%O 1,2
%A _R. H. Hardin_, Mar 01 2012
|
