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A079569
Number of unlabeled, connected graphs on n vertices which have no induced subgraph isomorphic to a P5 and are chordal and prime.
0
0, 0, 0, 1, 1, 5, 15, 68, 343, 2131, 16020, 150841
OFFSET
1,6
COMMENTS
P5 = path on five vertices. G chordal iff every cycle of size 4 or more has a chord. G prime if it has no module (homogeneous set.)
REFERENCES
A. Brandstadt, F. Dragan, H.O. Le, R. Mosca, "New Graph Classes of Bounded Clique-Width," manuscript, 2002.
LINKS
F. Hüffner, tinygraph, software for generating integer sequences based on graph properties, version e8699da.
CROSSREFS
Sequence in context: A149629 A149630 A149631 * A149632 A149633 A149634
KEYWORD
more,nonn
AUTHOR
Jim Nastos, Jan 24 2003
EXTENSIONS
a(10)-a(12) added using tinygraph by Falk Hüffner, Jan 17 2016
STATUS
approved