id:A001374 - OEIS Search Results

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

+0
4

4, 136, 44224, 179228736, 9383939974144, 6558936236286040064, 62879572771326489528942592, 8439543710699844562674685252214784, 16110027001555070629022725866559372785352704 (list; graph; listen)

	OFFSET	`1,1`
	REFERENCES	`N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).` `N. J. A. Sloane, A Handbook of Integer Sequences, Academic Press, 1973 (includes this sequence).` W. Oberschelp, ``Strukturzahlen in endlichen Relationssystemen,'' in Contributions to Mathematical Logic (Proceedings 1966 Hanover Colloquium), pp. 199-213, North-Holland Publ., Amsterdam, 1968.
	CROSSREFS	`Cf. A004105, A053468.` `Sequence in context: A012052 A054052 A012070 this_sequence A155207 A089666 A029850` `Adjacent sequences: A001371 A001372 A001373 this_sequence A001375 A001376 A001377`
	KEYWORD	`nonn,nice,easy`
	AUTHOR	`N. J. A. Sloane (njas(AT)research.att.com).`
	EXTENSIONS	`More terms from Vladeta Jovovic (vladeta(AT)eunet.rs), Jan 14 2000`

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.

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