A018197 - OEIS

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A018197

Possible numbers of complements of topologies on 6 points.

1, 5, 16, 27, 31, 64 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,2`
	REFERENCES	`J. I. Brown and S. Watson, The number of complements of a topology on n points is at least 2^n (except for some special cases), Discr. Math., 154 (1996), 27-39.`
	CROSSREFS	`Sequence in context: A102045 A055508 A171787 * A061874 A017449 A056736` `Adjacent sequences: A018194 A018195 A018196 * A018198 A018199 A018200`
	KEYWORD	`nonn`
	AUTHOR	`N. J. A. Sloane (njas(AT)research.att.com).`

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Last modified February 16 20:14 EST 2012. Contains 205962 sequences.