A123446 Number of perfectly contractile perfect graphs on n nodes.

1, 2, 4, 11, 33, 147, 896, 8683, 131333, 3065118

Offset

1,2

Links

Table of n, a(n) for n=1..10.

S. Hougardy, Home Page

S. Hougardy, Classes of perfect graphs, Discr. Math. 306 (2006), 2529-2571.

Jessica Shi, Enumeration of unlabeled graph classes: A study of tree decompositions and related approaches, 2015.

Crossrefs

Sequence in context: A123447 A123461 A123407 * A123460 A123454 A123433

Adjacent sequences: A123443 A123444 A123445 * A123447 A123448 A123449

Keyword

nonn,more

Author

N. J. A. Sloane, Oct 18 2006

Status

approved