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URL: https://oeis.org/A243246

⇱ A243246 - OEIS

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A243246
Number of unlabeled, connected graphs on n vertices with at least one subgraph isomorphic to a C_5, where C_5 is the cycle graph on five vertices.
0
0, 0, 0, 0, 8, 68, 709, 10540, 258623, 11704072, 1006628171, 164059321534, 50335903460830, 29003487412989468
OFFSET
1,5
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, Cycle Graph
FORMULA
a(n) = A001349(n) - A241784(n).
CROSSREFS
Sequence in context: A054915 A073555 A167859 * A113357 A030992 A091590
KEYWORD
nonn,more
AUTHOR
Travis Hoppe and Anna Petrone, Jun 01 2014
EXTENSIONS
a(11)-a(14) from formula by Falk Hüffner, Sep 22 2020
STATUS
approved