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A088895 Number of intersecting T_0-antichains on a labeled n-set. 0
1, 2, 2, 4, 41, 2104, 1387915, 229780525655 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

COMMENTS

An antichain on a set is a T_0-antichain if for every two distinct pointsf the set there exists a member of the antichain containing one but not the other point.

LINKS

Table of n, a(n) for n=0..7.

CROSSREFS

Cf. A001206, A051185, A059083.

Sequence in context: A257617 A309344 A257618 * A257619 A075806 A295580

Adjacent sequences:  A088892 A088893 A088894 * A088896 A088897 A088898

KEYWORD

hard,nonn

AUTHOR

Goran Kilibarda, Vladeta Jovovic, Nov 28 2003

STATUS

approved

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Last modified February 18 02:57 EST 2020. Contains 332006 sequences. (Running on oeis4.)