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A123448 Number of permutation perfect graphs on n nodes. 0
1, 2, 4, 11, 33, 142, 776, 5699, 50723, 524572 (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: A123468 A123415 A123469 * A039707 A005470 A123471

Adjacent sequences:  A123445 A123446 A123447 * A123449 A123450 A123451

KEYWORD

nonn

AUTHOR

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

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Last modified February 16 15:58 EST 2012. Contains 205936 sequences.