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A123441 Number of P_4-sparse perfect graphs on n nodes. 0
1, 2, 4, 11, 27, 78, 218, 653, 1963, 6088 (list; graph; refs; listen; history; internal format)
OFFSET

1,2

REFERENCES

S. Hougardy, Classes of perfect graphs, Discr. Math. 306 (2006), 2529-2571.

LINKS

S. Hougardy, Home Page

CROSSREFS

Sequence in context: A159337 A123440 A071314 * A086441 A148130 A131482

Adjacent sequences:  A123438 A123439 A123440 * A123442 A123443 A123444

KEYWORD

nonn

AUTHOR

N. J. A. Sloane (njas(AT)research.att.com), Oct 18 2006

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Last modified February 17 19:13 EST 2012. Contains 206085 sequences.