login
A123440
Number of P_4-reducible perfect graphs on n nodes.
0
1, 2, 4, 11, 27, 76, 212, 631, 1893, 5846
OFFSET
1,2
LINKS
S. Hougardy, Home Page
S. Hougardy, Classes of perfect graphs, Discr. Math. 306 (2006), 2529-2571.
CROSSREFS
Sequence in context: A159337 A243736 A316772 * A071314 A309886 A123441
KEYWORD
nonn,more
AUTHOR
N. J. A. Sloane, Oct 18 2006
STATUS
approved