Number of unlabeled, connected graphs on n vertices with at least one subgraph isomorphic to a C_4, where C_4 is the cycle graph on four vertices.
A243243
Number of unlabeled, connected graphs on n vertices with at least one subgraph isomorphic to a C_4, where C_4 is the cycle graph on four vertices.
Terms
- a(0) =0a(1) =0a(2) =0a(3) =3a(4) =13a(5) =93a(6) =796a(7) =10931a(8) =260340a(9) =11713182a(10) =1006682063a(11) =164059710255
External references
- oeis: A243243