id:A028858 - OEIS Search Results

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Number of prime unlabeled connected T_0 topologies (i.e. prime T_0 connected homeomorphism classes) on n points.

+0
1

1, 3, 9, 44, 235, 1650, 14502, 163335, 2360675, 43944974 (list; graph; listen)

	OFFSET	`2,2`
	REFERENCES	`R. Kreminski, "Graphs and matrices in the study of (finite) topological spaces", Missouri J. Mathematical Sciences, Volume 12 (Issue #2, Spring 2000).`
	LINKS	`Missouri J. Mathematical Sciences (New web address)`
	CROSSREFS	`Sequence in context: A167143 A136732 A108239 this_sequence A058106 A021103 A001902` `Adjacent sequences: A028855 A028856 A028857 this_sequence A028859 A028860 A028861`
	KEYWORD	`nonn`
	AUTHOR	`Richard M Kreminski (kremin(AT)boisdarc.tamu-commerce.edu)`

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.