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A123416 Number of comparability perfect graphs on n nodes. 0
1, 2, 4, 11, 33, 144, 824, 6793, 75400, 1107853, 21021998 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
COMMENTS
All comparability graphs are perfect. - Jakub Jablonski, Sep 07 2020
LINKS
Table of n, a(n) for n=1..11.
S. Hougardy, Home Page
S. Hougardy, Classes of perfect graphs, Discr. Math. 306 (2006), 2529-2571.
CROSSREFS
Sequence in context: A039707 A005470 A123471 * A123406 A123453 A351157
Adjacent sequences: A123413 A123414 A123415 * A123417 A123418 A123419
KEYWORD
nonn,more
AUTHOR
N. J. A. Sloane, Oct 18 2006
EXTENSIONS
a(11) from Jakub Jablonski, Sep 07 2020
STATUS
approved

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Last modified June 12 07:01 EDT 2024. Contains 373325 sequences. (Running on oeis4.)