id:A026586 - OEIS Search Results

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Number of labeled essential directed acyclic graphs (DAGs).

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1, 1, 4, 59, 2616, 306117, 87716644, 58874478231, 90018247082416, 307775459402071913, 2322338398654088751036, 38293189001166839643861795, 1369158635491114830895696234696, 105480725505896171175318367295035341 (list; graph; listen)

	OFFSET	`1,3`
	REFERENCES	`Bertran Steinsky, Enumeration of labeled chain graphs and labeled essential directed acyclic graphs, Discrete Mathematics, 270 (2003), 267-278.`
	CROSSREFS	`Sequence in context: A113251 A093597 A126754 this_sequence A058173 A074835 A060492` `Adjacent sequences: A026583 A026584 A026585 this_sequence A026587 A026588 A026589`
	KEYWORD	`nonn`
	AUTHOR	`Detlef Pauly (dettodet(AT)yahoo.de), Aug 22 2003.`

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Last modified August 29 14:50 EDT 2008. Contains 143238 sequences.

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