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A092918 Number of connected hypergraphs (without multiple edges and without empty edges) on n labeled vertices. 9
2, 4, 96, 31840, 2147156736, 9223372011084915712, 170141183460469231602560095199828453376, 57896044618658097711785492504343953923912733397452774312021795134847892828160 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

REFERENCES

G. Kilibarda and V. Jovovic, "Enumeration of some classes of T_0-hypergraphs", in preparation, 2004.

LINKS

Table of n, a(n) for n=1..8.

FORMULA

E.g.f.: log(Sum(2^(2^n-1)*x^n/n!, n=0..infinity)).

CROSSREFS

Sequence in context: A007534 A299784 A009379 * A018428 A128773 A101068

Adjacent sequences:  A092915 A092916 A092917 * A092919 A092920 A092921

KEYWORD

nonn

AUTHOR

Goran Kilibarda, Vladeta Jovovic, Apr 16 2004

STATUS

approved

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Last modified October 17 22:05 EDT 2019. Contains 328134 sequences. (Running on oeis4.)