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A088888 Number of intersecting T_0-hypergraphs on a labeled n-set. 0
2, 4, 26, 1190, 1302204, 912799349556, 291201248247281713961832 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Intersecting hypergraph is intersecting T_0-hypergraph if for every two distinct nodes there exists a hyperedge containing one but not the other node.

LINKS

Table of n, a(n) for n=1..7.

CROSSREFS

Cf. A051185, A059083.

Sequence in context: A182146 A218077 A240040 * A102996 A189896 A095182

Adjacent sequences:  A088885 A088886 A088887 * A088889 A088890 A088891

KEYWORD

hard,nonn

AUTHOR

Goran Kilibarda, Vladeta Jovovic, Nov 28 2003

STATUS

approved

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Last modified September 19 12:57 EDT 2019. Contains 327198 sequences. (Running on oeis4.)