Number of multigraphs on n labeled edges (without loops).
A020554
Number of multigraphs on n labeled edges (without loops).
Terms
- a(0) =1a(1) =1a(2) =3a(3) =16a(4) =139a(5) =1750a(6) =29388a(7) =624889a(8) =16255738a(9) =504717929a(10) =18353177160a(11) =769917601384
External references
- oeis: A020554