id:A052112 - OEIS Search Results

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Number of self-complementary directed 2-multigraphs on n nodes.

+0
1

1, 2, 14, 159, 7629, 599456, 226066304, 139178815861, 410179495378288, 2055126126323159298, 48234291396964332998082, 2016523952125103590736221923, 382812826011951187177138562992638 (list; graph; listen)

	OFFSET	`1,2`
	COMMENT	`A 2-multigraph is similar to an ordinary graph except there are 0, 1 or 2 edges between any two nodes (self-loops are not allowed).`
	CROSSREFS	`Cf. A053467, A003086, A053588.` `Sequence in context: A036079 A121227 A060193 this_sequence A074635 A124215 A003582` `Adjacent sequences: A052109 A052110 A052111 this_sequence A052113 A052114 A052115`
	KEYWORD	`nonn`
	AUTHOR	`Vladeta Jovovic (vladeta(AT)eunet.rs), Jan 21 2000`

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Last modified November 23 17:09 EST 2009. Contains 167438 sequences.

AT&T Labs Research