A243568 Number of simple connected graphs with n nodes that are have no subgraph isomorphic to diamond graph or the bull graph.
1, 1, 2, 4, 9, 26, 80, 340, 1690, 11432, 101142, 1228608, 20329150
Offset: 1
Links
- Travis Hoppe and Anna Petrone, Encyclopedia of Finite Graphs
- F. Hüffner, tinygraph, software for generating integer sequences based on graph properties, version 29e68fa.
Extensions
a(11)-a(13) added using tinygraph by Falk Hüffner, Sep 23 2020