A123447 Number of perfectly orderable perfect graphs on n nodes.

1, 2, 4, 11, 33, 147, 896, 8682, 131299, 3062755

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: A123405 A123457 A123455 * A123461 A123407 A123446

Adjacent sequences: A123444 A123445 A123446 * A123448 A123449 A123450

Keyword

nonn,more

Author

N. J. A. Sloane, Oct 18 2006

Status

approved