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Search: id:A092918
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| A092918 |
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Number of connected hypergraphs(without multiple edges and without empty edges)on n labeled vertices. |
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+0
1
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| 2, 4, 96, 31840, 2147156736, 9223372011084915712, 170141183460469231602560095199828453376, 57896044618658097711785492504343953923912733397452774312021795134847892828160
(list; graph; listen)
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OFFSET
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1,1
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REFERENCES
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G. Kilibarda and V. Jovovic, "Enumeration of some classes of T_0-hypergraphs", in preparation, 2004.
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FORMULA
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E.g.f.: ln(Sum(2^(2^n-1)*x^n/n!, n=0..infinity)).
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CROSSREFS
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Sequence in context: A018410 A007534 A009379 this_sequence A018428 A128773 A101068
Adjacent sequences: A092915 A092916 A092917 this_sequence A092919 A092920 A092921
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KEYWORD
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nonn
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AUTHOR
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Goran Kilibarda, Vladeta Jovovic (vladeta(AT)Eunet.yu), Apr 16 2004
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