A243568 - OEIS

%I #14 Sep 23 2020 16:01:04

%S 1,1,2,4,9,26,80,340,1690,11432,101142,1228608,20329150

%N Number of simple connected graphs with n nodes that are have no subgraph isomorphic to diamond graph or the bull graph.

%H Travis Hoppe and Anna Petrone, <a href="https://github.com/thoppe/Encyclopedia-of-Finite-Graphs">Encyclopedia of Finite Graphs</a>

%H F. Hüffner, <a href="https://github.com/falk-hueffner/tinygraph">tinygraph</a>, software for generating integer sequences based on graph properties, version 29e68fa.

%Y Cf. A242790 (no diamond subgraphs), A244427 (no bull subgraphs).

%K nonn,more

%O 1,3

%A _Travis Hoppe_ and _Anna Petrone_, Jun 06 2014

%E a(11)-a(13) added using tinygraph by _Falk Hüffner_, Sep 23 2020