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Search: id:A051240
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| A051240 |
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Number of 4-uniform hypergraphs on n unlabeled nodes, or equivalently pure 3-dimensional simplicial complexes on n unlabeled nodes.
(Formerly M1723)
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+0
4
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| 1, 1, 1, 2, 6, 156, 7013320, 29281354514767168, 234431745534048922731115555415680, 453456943706240925312368435237969462391555337386758635520
(list; graph; listen)
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OFFSET
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1,4
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REFERENCES
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V. Jovovic, On the number of m-place relations (in Russian), Logiko-algebraicheskie konstruktsii, Tver, 1992, 59-66.
E. M. Palmer, On the number of n-plexes, Discrete Math., 6 (1973), 377-390. [The numbers are incorrect]
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CROSSREFS
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Cf. A000665, A092337.
Sequence in context: A015173 A122570 A088430 this_sequence A003189 A135937 A137532
Adjacent sequences: A051237 A051238 A051239 this_sequence A051241 A051242 A051243
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KEYWORD
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nonn,nice
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AUTHOR
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Vladeta Jovovic (vladeta(AT)Eunet.yu)
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