Number of alternately orientable perfect graphs on n nodes.
A123405
Number of alternately orientable perfect graphs on n nodes.
Terms
- a(0) =1a(1) =2a(2) =4a(3) =11a(4) =33a(5) =147a(6) =896a(7) =8673a(8) =130683a(9) =3012745
External references
- oeis: A123405