%N Number of non-isomorphic maximal independent sets of the n-cycle graph having no symmetry axis.
%C Number of non-isomorphic (i.e. defined up to a rotation and a reflection) maximal independent sets of the n-cycle graph having no symmetry axis. Also: Number of cyclic and non-palindromic compositions of n in which each term is either 2 or 3, where a clockwise writing is not distinguished from its counterclockwise counterpart.
%H R. Bisdorff and J.-L. Marichal, <a href="http://arXiv.org/abs/math.CO/0701647">Counting non-isomorphic maximal independent sets of the n-cycle graph</a>, arXiv:0701647 (2007) and <a href="https://cs.uwaterloo.ca/journals/JIS/VOL11/Marichal/marichal.html">JIS 11 (2008) 08.5.7</a>.
%F a(n) = Sum(d divides n) A127683(d) = A127685(n) - A127682(n)
%Y Cf. A127682, A127683, A127685.
%A Jean-Luc Marichal (jean-luc.marichal(AT)uni.lu), Jan 24 2007