A129524 - OEIS

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A129524

Number of unlabeled digraphs on n vertices such that every vertex has outdegree 2.

0, 1, 6, 79, 1499, 35317, 967255, 29949217 (list; graph; refs; listen; history; internal format)

	OFFSET	`2,3`
	LINKS	`L. Travis, [math/9811127] Graphical Enumeration: A Species-Theoretic Approach`
	CROSSREFS	`Cf. A001373, A185193, A185194, A185303.` `Sequence in context: A156929 A123796 A184553 * A131237 A024082 A132547` `Adjacent sequences: A129521 A129522 A129523 * A129525 A129526 A129527`
	KEYWORD	`nonn,changed`
	AUTHOR	`Vladeta Jovovic (vladeta(AT)eunet.rs), May 29 2007`

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Last modified February 17 16:49 EST 2012. Contains 206058 sequences.