Number of 4-valent labeled graphs with n nodes where multiple edges and loops are allowed.
A005816
Number of 4-valent labeled graphs with n nodes where multiple edges and loops are allowed.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =15a(4) =138a(5) =2021a(6) =43581a(7) =1295493a(8) =50752145a(9) =2533755933a(10) =157055247261
External references
- oeis: A005816