Number of simple labeled graphs on 2n nodes with exactly n connected components that are trees or cycles.

A309313

Number of simple labeled graphs on 2n nodes with exactly n connected components that are trees or cycles.

Terms

    a(0) =1a(1) =1a(2) =19a(3) =540a(4) =23597a(5) =1381695a(6) =101682724a(7) =9016296289a(8) =935625630797

External references