A001374 - OEIS

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A001374

Relational systems on n nodes. Also directed 3-multigraphs with loops on n nodes.
(Formerly M3717 N1519)

4, 136, 44224, 179228736, 9383939974144, 6558936236286040064, 62879572771326489528942592, 8439543710699844562674685252214784, 16110027001555070629022725866559372785352704 (list; graph; refs; listen; history; text; internal format)

	OFFSET	`1,1`
	REFERENCES	W. Oberschelp, ``Strukturzahlen in endlichen Relationssystemen,'' in Contributions to Mathematical Logic (Proceedings 1966 Hanover Colloquium), pp. 199-213, North-Holland Publ., Amsterdam, 1968. `N. J. A. Sloane, A Handbook of Integer Sequences, Academic Press, 1973 (includes this sequence).` `N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).`
	LINKS	`Table of n, a(n) for n=1..9.`
	CROSSREFS	`Cf. A004105, A053468.` `Sequence in context: A012052 A054052 A012070 * A155207 A201388 A089666` `Adjacent sequences: A001371 A001372 A001373 * A001375 A001376 A001377`
	KEYWORD	`nonn,nice,easy`
	AUTHOR	`N. J. A. Sloane.`
	EXTENSIONS	`More terms from Vladeta Jovovic, Jan 14 2000`
	STATUS	`approved`

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Last modified May 25 23:56 EDT 2013. Contains 225650 sequences.