Number of simple labeled graphs on n nodes with exactly 2 connected components that are trees or cycles.
A215852
Number of simple labeled graphs on n nodes with exactly 2 connected components that are trees or cycles.
Terms
- a(0) =1a(1) =3a(2) =19a(3) =135a(4) =1267a(5) =15029a(6) =218627a(7) =3783582a(8) =75956664a(9) =1734309929a(10) =44357222772
External references
- oeis: A215852