id:A046905 - OEIS Search Results

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Posets with n points with property that there is no nonsingelton proper subset T for which x not in T implies x<T or x>T or x incomparable with every element of T.

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1, 1, 0, 0, 24, 360, 17400, 1066800 (list; graph; listen)

	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.`
	LINKS	`Index entries for sequences related to posets`
	CROSSREFS	`A subset of the posets enumerated in A003431. Cf. A046904.` `Sequence in context: A081144 A126780 A052741 this_sequence A028115 A125481 A028074` `Adjacent sequences: A046902 A046903 A046904 this_sequence A046906 A046907 A046908`
	KEYWORD	`nonn`
	AUTHOR	`John A. Wright.`

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Last modified March 14 16:07 EDT 2010. Contains 173425 sequences.

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