A123469 Number of 2-overlap triangle-free perfect graphs on n nodes.

1, 2, 4, 11, 33, 140, 586, 2379, 9495, 38436

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.

Crossrefs

Sequence in context: A123463 A123468 A123415 * A123448 A039707 A005470

Adjacent sequences: A123466 A123467 A123468 * A123470 A123471 A123472

Keyword

nonn,more

Author

N. J. A. Sloane, Oct 18 2006

Status

approved