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A079564
Number of unlabeled graphs on n vertices with no induced subgraphs isomorphic to a P5 or complement of a P5 (P5 = path on 5 vertices.).
0
1, 1, 2, 6, 19, 78, 345, 1780, 10030, 62602, 429607, 3285435, 28623679, 296580989, 3897603006
OFFSET
1,3
LINKS
J. L. Fouquet, A Decomposition for a class of (P5,P5-bar)-free graphs, Discrete Math. 121 (1993) 75-83.
V. Giakoumakis and I. Rusu, Weighted Parameters in (P5,P5-bar)-free graphs, Discrete Appl. Math. 80 (2-3) (1997) 255-261.
F. Hüffner, tinygraph, software for generating integer sequences based on graph properties, version 39d0919.
CROSSREFS
Sequence in context: A138800 A008989 A057240 * A273988 A287897 A349401
KEYWORD
nonn,more
AUTHOR
Jim Nastos, Jan 24 2003
EXTENSIONS
Terms a(10)-a(15) added using tinygraph by Falk Hüffner, Jan 13 2016
STATUS
approved