%I #8 Jun 30 2018 14:53:04
%S 1,2,4,10,27,95,398,2164,14945,131562,1454388,20019052,341159201
%N Number of C_4-free Berge perfect graphs on n nodes.
%H S. Hougardy, <a href="http://dx.doi.org/10.1016/j.disc.2006.05.021">Classes of perfect graphs</a>, Discr. Math. 306 (2006), 2529-2571.
%H F. Hüffner, <a href="https://github.com/falk-hueffner/tinygraph">tinygraph</a>, software for generating integer sequences based on graph properties, version 7289304.
%K nonn
%O 1,2
%A _N. J. A. Sloane_, Oct 18 2006
%E a(11)-a(13) added using tinygraph by _Falk Hüffner_, Jun 30 2018
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