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A028853 Number of prime labeled topologies on n points. 0
4, 29, 320, 6942, 205760, 9535241 (list; graph; refs; listen; history; text; internal format)
OFFSET

2,1

REFERENCES

R. Kreminski, "Graphs and matrices in the study of (finite) topological spaces", Missouri J. Mathematical Sciences, Volume 12 (Issue #2, Spring 2000).

LINKS

Table of n, a(n) for n=2..7.

Missouri J. Mathematical Sciences (New web address)

CROSSREFS

Sequence in context: A195194 A215955 A295237 * A118795 A325478 A099700

Adjacent sequences:  A028850 A028851 A028852 * A028854 A028855 A028856

KEYWORD

nonn

AUTHOR

Richard M Kreminski (kremin(AT)boisdarc.tamu-commerce.edu)

STATUS

approved

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Last modified November 27 12:51 EST 2021. Contains 349394 sequences. (Running on oeis4.)