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A123404 Number of alternately colorable perfect graphs on n nodes. 0
1, 2, 4, 11, 32, 136, 749, 6142, 71759, 1174550 (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: A123434 A123424 A123449 * A178925 A123439 A026164

Adjacent sequences:  A123401 A123402 A123403 * A123405 A123406 A123407

KEYWORD

nonn

AUTHOR

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

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Last modified February 17 00:09 EST 2012. Contains 205978 sequences.