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A028848 Number of composite labeled T_0 topologies on n points. 0
0, 0, 25, 0, 2641, 0 (list; graph; refs; listen; history; text; internal format)
OFFSET

2,3

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: A059062 A179809 A110416 * A172298 A040630 A040631

Adjacent sequences:  A028845 A028846 A028847 * A028849 A028850 A028851

KEYWORD

nonn

AUTHOR

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

STATUS

approved

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Last modified January 29 14:23 EST 2020. Contains 331338 sequences. (Running on oeis4.)