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A028852 Number of composite unlabeled connected T_0 topologies (i.e., composite T_0 connected homeomorphism classes) on n points. 0
0, 0, 1, 0, 3, 0, 10, 6, 44, 0 (list; graph; refs; listen; history; text; internal format)
OFFSET

2,5

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..11.

Missouri J. Mathematical Sciences (New web address)

CROSSREFS

Sequence in context: A293939 A342926 A119957 * A319202 A327072 A327377

Adjacent sequences:  A028849 A028850 A028851 * A028853 A028854 A028855

KEYWORD

nonn

AUTHOR

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

STATUS

approved

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Last modified October 23 22:31 EDT 2021. Contains 348217 sequences. (Running on oeis4.)