A079566 - OEIS

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A079566

Number of unlabeled, connected graphs on n vertices which have no induced subgraph isomorphic to a C4 (cycle on 4 vertices.) Also known as "squarefree" graphs.

1, 1, 2, 5, 16, 63, 313, 2014, 16724 (list; graph; refs; listen; history; text; internal format)

	OFFSET	`1,3`
	REFERENCES	`Z. Blazski, M. Hujter, M. Pluhar and Zs. Tuza, "Graphs with no C4 and 2K2," Discrete Math. 115 (1993) 51-55.`
	LINKS	`Table of n, a(n) for n=1..9.`
	CROSSREFS	`Sequence in context: A022494 A136127 A111004 * A059685 A000112 A205498` `Adjacent sequences: A079563 A079564 A079565 * A079567 A079568 A079569`
	KEYWORD	`more,nonn`
	AUTHOR	`Jim Nastos, Jan 24 2003`
	STATUS	`approved`

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Last modified May 23 09:11 EDT 2013. Contains 225586 sequences.