A123439 Number of P_4-lite perfect graphs on n nodes.

1, 2, 4, 11, 33, 94, 278, 841, 2613, 8314

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: A298445 A294224 A296270 * A026164 A192405 A035354

Adjacent sequences: A123436 A123437 A123438 * A123440 A123441 A123442

Keyword

nonn,more

Author

N. J. A. Sloane, Oct 18 2006

Status

approved