Number of nonempty labeled simple graphs on nodes chosen from an n-set.

A004140

Number of nonempty labeled simple graphs on nodes chosen from an n-set.

Terms

    a(0) =0a(1) =1a(2) =4a(3) =17a(4) =112a(5) =1449a(6) =40068a(7) =2350601a(8) =286192512a(9) =71213783665

External references