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Search: id:A001374
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| A001374 |
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Relational systems on n nodes. Also directed 3-multigraphs with loops on n nodes.
(Formerly M3717 N1519)
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+0
3
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| 4, 136, 44224, 179228736, 9383939974144, 6558936236286040064, 62879572771326489528942592, 8439543710699844562674685252214784, 16110027001555070629022725866559372785352704
(list; graph; listen)
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OFFSET
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1,1
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REFERENCES
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W. Oberschelp, ``Strukturzahlen in endlichen Relationssystemen,'' in Contributions to Mathematical Logic (Proceedings 1966 Hanover Colloquium), pp. 199-213, North-Holland Publ., Amsterdam, 1968.
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CROSSREFS
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Cf. A004105, A053468.
Adjacent sequences: A001371 A001372 A001373 this_sequence A001375 A001376 A001377
Sequence in context: A012052 A054052 A012070 this_sequence A089666 A029850 A093981
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KEYWORD
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nonn,nice,easy
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AUTHOR
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njas
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EXTENSIONS
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More terms from Vladeta Jovovic (vladeta(AT)Eunet.yu), Jan 14 2000
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