id:A028857 - OEIS Search Results

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

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2, 6, 18, 94, 500, 3485 (list; graph; listen)

	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	`Missouri J. Mathematical Sciences (New web address)`
	CROSSREFS	`Sequence in context: A165774 A053505 A000138 this_sequence A052687 A162059 A162060` `Adjacent sequences: A028854 A028855 A028856 this_sequence A028858 A028859 A028860`
	KEYWORD	`nonn`
	AUTHOR	`Richard M Kreminski (kremin(AT)boisdarc.tamu-commerce.edu)`

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Last modified November 27 22:38 EST 2009. Contains 167602 sequences.