Number of undirected labeled graphs on n nodes with exactly 2 cycle graphs as connected components.
A215772
Number of undirected labeled graphs on n nodes with exactly 2 cycle graphs as connected components.
Terms
- a(0) =1a(1) =3a(2) =7a(3) =25a(4) =127a(5) =777a(6) =5547a(7) =45216a(8) =414144a(9) =4209480a(10) =47009880a(11) =572101920a(12) =7535302560a(13) =106791531840
External references
- oeis: A215772