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%I #12 Jul 25 2019 04:35:56
%S 1,1,1,3,5,15,37,119,365,1258,4346,15773,58058,219016,837482,3250770,
%T 12758359,50602829
%N Number of connected (6,2)-chordal bipartite graphs on n nodes.
%C Bipartite (6,2)-chordal graphs are exactly the bipartite distance-hereditary graphs (see D'Atri and Moscarini). - _Falk Hüffner_, Jul 25 2019
%H A. D'Atri and M. Moscarini, <a href="https://doi.org/10.1137/0217032">Distance-hereditary graphs, Steiner trees, and connected domination</a>, SIAM J. Comput. 17(3) (1988), 521-538.
%H F. Hüffner, <a href="https://github.com/falk-hueffner/tinygraph">tinygraph</a>, software for generating integer sequences based on graph properties, version 9766535.
%H Jessica Shi, <a href="https://pdfs.semanticscholar.org/c264/67cd4a5f0adee094d7c19fd8a08a78b46793.pdf">Enumeration of unlabeled graph classes: A study of tree decompositions and related approaches</a>, 2015.
%Y Cf. A280765 (not necessarily connected).
%K nonn,more
%O 1,4
%A _N. J. A. Sloane_, Jan 17 2017
%E a(11)-a(18) added using tinygraph by _Falk Hüffner_, Jul 25 2019
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