A243248 Number of unlabeled, connected graphs on n vertices with at least one subgraph isomorphic to a bull-graph.

0, 0, 0, 0, 12, 86, 773, 10777, 259390, 11705139

Offset: 1

Author

Travis Hoppe and Anna Petrone, Jun 01 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 [math.CO], 2014
• Eric Weisstein's World of Mathematics, Bull Graph

Crossrefs

Cf. A244427 (no bull subgraphs).

Formula

a(n) = A001349(n) - A244427(n).