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A079453
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Number of unlabeled and connected graphs on n vertices which are HH-free ("house-hole-free").
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0
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OFFSET
| 1,3
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COMMENTS
| Also characterized as Weakly Chordal Meyniel graphs or P5-free Weakly Chordal graphs.
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REFERENCES
| R. Hayward, Meyniel Weakly Triangulated Graphs I: Co-perfect orderability Discrete Applied Mathematics 73 (1997) 199-210
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CROSSREFS
| Sequence in context: A008989 A057240 A079564 * A186770 A127942 A110956
Adjacent sequences: A079450 A079451 A079452 * A079454 A079455 A079456
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KEYWORD
| more,nonn
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AUTHOR
| Jim Nastos (nastos(AT)gmail.com), Jan 13 2003
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EXTENSIONS
| Corrected by Jim Nastos, Jan 20 2003
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