login
A123427
Number of i-triangulated perfect graphs on n nodes.
0
1, 2, 4, 11, 31, 117, 504, 2772, 18738, 158931, 1679288, 22160769
OFFSET
1,2
LINKS
S. Hougardy, Home Page
S. Hougardy, Classes of perfect graphs, Discr. Math. 306 (2006), 2529-2571.
CROSSREFS
Sequence in context: A063254 A280766 A123443 * A123421 A123430 A086690
KEYWORD
nonn,more
AUTHOR
N. J. A. Sloane, Oct 18 2006
EXTENSIONS
a(11)-a(12) from Jakub Jablonski, Sep 16 2020
STATUS
approved