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A006785 Triangle-free graphs on n vertices.
(Formerly M0841)
1
1, 2, 3, 7, 14, 38, 107, 410, 1897, 12172, 105071, 1262180, 20797002, 467871369, 14232552452, 581460254001, 31720840164950 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

REFERENCES

Brendan McKay, personal communication.

W. Pu, J. Choi, E. Amir, Lifted Inference On Transitive Relations, Workshops at the Twenty-Seventh AAAI Conference on Statistical Relational Artificial Intelligence, 2013.

N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).

LINKS

Table of n, a(n) for n=1..17.

P. J. Cameron, Sequences realized by oligomorphic permutation groups, J. Integ. Seqs. Vol. 3 (2000), #00.1.5.

B. D. McKay, Isomorph-free exhaustive generation, J Algorithms, 26 (1998) 306-324..

Eric Weisstein's World of Mathematics, Triangle-Free Graph

CROSSREFS

Sequence in context: A090828 A049367 A089790 * A113182 A165433 A238728

Adjacent sequences:  A006782 A006783 A006784 * A006786 A006787 A006788

KEYWORD

nonn

AUTHOR

N. J. A. Sloane.

EXTENSIONS

2 more terms (from the McKay paper) from Vladeta Jovovic, May 17 2008

2 more terms from Brendan McKay, Jan 12 2013

STATUS

approved

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Last modified December 21 10:54 EST 2014. Contains 252306 sequences.