A280765 Number of (6,2)-chordal bipartite graphs on n nodes.

1, 2, 3, 7, 13, 33, 79, 229, 671, 2179, 7283, 25632, 92427, 342676, 1293482, 4966625, 19322745, 76069927

Offset

1,2

Comments

Equivalently, number of bipartite distance-hereditary graphs (see D'Atri and Moscarini). - Falk Hüffner, Jun 30 2018

Links

Table of n, a(n) for n=1..18.

A. D'Atri and M. Moscarini, Distance-hereditary graphs, Steiner trees, and connected domination, SIAM J. Comput. 17(3) (1988), 521-538.

F. Hüffner, tinygraph, software for generating integer sequences based on graph properties, version 3e9b2ba.

Jessica Shi, Enumeration of unlabeled graph classes: A study of tree decompositions and related approaches, 2015.

Crossrefs

Cf. A280764.

Sequence in context: A259145 A237255 A129859 * A056953 A371867 A321681

Adjacent sequences: A280762 A280763 A280764 * A280766 A280767 A280768

Keyword

nonn,more

Author

N. J. A. Sloane, Jan 17 2017

Extensions

a(10)-a(18) added using tinygraph by Falk Hüffner, Jun 30 2018

Status

approved