Number of unsensed 2-connected maps with n edges and without faces of degree 2.
A006405
Number of unsensed 2-connected maps with n edges and without faces of degree 2.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =5a(4) =9a(5) =24a(6) =70a(7) =222a(8) =785a(9) =3055
External references
- oeis: A006405