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A123447
Number of perfectly orderable perfect graphs on n nodes.
0
1, 2, 4, 11, 33, 147, 896, 8682, 131299, 3062755
OFFSET
1,2
LINKS
S. Hougardy, Home Page
S. Hougardy, Classes of perfect graphs, Discr. Math. 306 (2006), 2529-2571.
CROSSREFS
Sequence in context: A123405 A123457 A123455 * A123461 A123407 A123446
KEYWORD
nonn,more
AUTHOR
N. J. A. Sloane, Oct 18 2006
STATUS
approved