id:A005641 - OEIS Search Results

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Number of 2-diregular digraphs with n nodes.
(Formerly M2757)

+0
1

1, 3, 8, 27, 131, 711, 5055, 41607, 389759, 4065605, 46612528, 581713045, 7846380548, 113718755478, 1762208816647, 29073392136390, 508777045979418 (list; graph; listen)

	OFFSET	`2,2`
	REFERENCES	`M. V. S. Ramanath; T. R. Walsh, Enumeration and generation of a class of regular digraphs, J. Graph Theory 11 (1987), no. 4, 471-479.`
	CROSSREFS	`Sequence in context: A104854 A030495 A074271 this_sequence A026627 A093356 A135583` `Adjacent sequences: A005638 A005639 A005640 this_sequence A005642 A005643 A005644`
	KEYWORD	`nonn`
	AUTHOR	`njas`

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Last modified September 5 01:44 EDT 2008. Contains 143476 sequences.

AT&T Labs Research