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A056104 Number of 9-antichain covers of a labeled n-set. 4
20, 1484110, 15936368770, 59961701958816, 121740972715475096, 167109117756164222210, 176340421320592288902670, 154794453668193645059165412, 118987888829384136293188343172 (list; graph; refs; listen; history; text; internal format)
OFFSET

6,1

REFERENCES

V. Jovovic and G. Kilibarda, On the number of Boolean functions in the Post classes F^{mu}_8, Diskretnaya Matematika, 11 (1999), no. 4, 127-138 (translated in Discrete Mathematics and Applications, 9, (1999), no. 6)

V. Jovovic, G. Kilibarda, On enumeration of the class of all monotone Boolean functions, in preparation.

LINKS

Table of n, a(n) for n=6..14.

K. S. Brown, Dedekind's problem

Eric Weisstein's World of Mathematics, Antichain covers

CROSSREFS

Cf. A056046-A056049, A056052, A051112-A051118.

Sequence in context: A203306 A211489 A172669 * A051117 A180725 A013812

Adjacent sequences:  A056101 A056102 A056103 * A056105 A056106 A056107

KEYWORD

nonn

AUTHOR

Vladeta Jovovic, Goran Kilibarda, Zoran Maksimovic, Jul 29 2000

STATUS

approved

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Last modified April 19 09:52 EDT 2021. Contains 343110 sequences. (Running on oeis4.)