id:A054918 - OEIS Search Results

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Number of connected unlabeled digraphs with n nodes such that complement is also connected.

+0
1

1, 1, 10, 180, 9120, 1520742, 878908844, 1791588717764, 13024366540532952, 341234368845828951004, 32522226812040344643993088, 11366680383641301437820379768750, 14669062959091969068110415719779627436 (list; graph; listen)

	OFFSET	`1,3`
	LINKS	`V. A. Liskovets, Some easily derivable sequences, J. Integer Sequences, 3 (2000), #00.2.2.`
	FORMULA	`2*A003085(n)-A000273(n).`
	CROSSREFS	`Sequence in context: A001762 A034908 A030048 this_sequence A095807 A064092 A121973` `Adjacent sequences: A054915 A054916 A054917 this_sequence A054919 A054920 A054921`
	KEYWORD	`nonn,easy`
	AUTHOR	`njas, May 24 2000`
	EXTENSIONS	`More terms from Vladeta Jovovic (vladeta(AT)Eunet.yu), Jul 19 2000`

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

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