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Size of the set CBFS_2(n) of cross-bifix-free binary words of length n.
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%I #9 Oct 20 2014 17:14:59

%S 1,1,2,3,5,8,14,23,42,72,132,227,429

%N Size of the set CBFS_2(n) of cross-bifix-free binary words of length n.

%H S. Bilotta, E. Pergola and R. Pinzani, <a href="http://arxiv.org/abs/1112.3168">A new approach to cross-bifix-free sets</a>, arXiv preprint arXiv:1112.3168, 2011

%Y Cf. A003000, A019308, A019309.

%K nonn

%O 3,3

%A _N. J. A. Sloane_, Apr 06 2012