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A243559 Number of simple connected graphs with n nodes that have no subgraph isomorphic to bull graph or K_4. 0
1, 1, 2, 5, 9, 26, 80, 340, 1690, 11432 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

COMMENTS

K_4 is the complete graph with four vertices.

LINKS

Table of n, a(n) for n=1..10.

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

CROSSREFS

Cf. A244427 (no bull subgraphs), A079574 (K_4 free graphs).

Sequence in context: A320798 A006405 A305189 * A136108 A026297 A109742

Adjacent sequences:  A243556 A243557 A243558 * A243560 A243561 A243562

KEYWORD

nonn,more

AUTHOR

Travis Hoppe and Anna Petrone, Jun 06 2014

STATUS

approved

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Last modified November 15 19:18 EST 2019. Contains 329149 sequences. (Running on oeis4.)