A243558 Number of simple connected graphs with n nodes that are planar and have no subgraph isomorphic to bull graph.

1, 1, 2, 6, 9, 25, 76, 302, 1360, 7606, 49313, 368568, 3046968

Offset: 1

Author

Travis Hoppe and Anna Petrone, Jun 06 2014

Keywords

• nonn
• more

Links

• Travis Hoppe and Anna Petrone, Encyclopedia of Finite Graphs
• T. Hoppe and A. Petrone, Integer sequence discovery from small graphs, arXiv preprint arXiv:1408.3644, 2014
• F. Hüffner, tinygraph, software for generating integer sequences based on graph properties, version 9766535.

Crossrefs

Cf. A244427 (no bull subgraphs), A003094 (planar graphs).

Extensions

a(11)-a(13) added using tinygraph by Falk Hüffner, May 09 2019