Number of labeled n-vertex graphs without 2-components and without isolated vertices (1-components).

A093377

Number of labeled n-vertex graphs without 2-components and without isolated vertices (1-components).

Terms

    a(0) =1a(1) =0a(2) =0a(3) =4a(4) =38a(5) =728a(6) =26864a(7) =1871576a(8) =251762204a(9) =66308767200

External references