The total number of components of size 2 over all simple labeled graphs on n nodes.
A182166
The total number of components of size 2 over all simple labeled graphs on n nodes.
Terms
- a(0) =1a(1) =3a(2) =12a(3) =80a(4) =960a(5) =21504a(6) =917504a(7) =75497472a(8) =12079595520
External references
- oeis: A182166