A046909 - OEIS

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A046909

Number of isomorphism classes of connected irreducible quasiorders with n labeled points.

1, 1, 1, 1, 2, 17, 167, 1672 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,5`
	REFERENCES	`J. A. Wright, There are 718 6-point topologies, quasi-orderings and transgraphs, Notices Amer. Math. Soc., 17 (1970), p. 646, Abstract #70T-A106.`
	CROSSREFS	`Cf. A046910.` `Sequence in context: A197864 A003419 A126109 * A041879 A011550 A102023` `Adjacent sequences: A046906 A046907 A046908 * A046910 A046911 A046912`
	KEYWORD	`nonn`
	AUTHOR	`John A. Wright.`

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Last modified February 16 21:17 EST 2012. Contains 205971 sequences.