A123405 Number of alternately orientable perfect graphs on n nodes.

1, 2, 4, 11, 33, 147, 896, 8673, 130683, 3012745

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: A277203 A123905 A123442 * A123457 A123455 A123447

Adjacent sequences: A123402 A123403 A123404 * A123406 A123407 A123408

Keyword

nonn,more

Author

N. J. A. Sloane, Oct 18 2006

Status

approved