A018196 - OEIS

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A018196

Possible numbers of complements of topologies on 5 points.

1, 4, 8, 9, 15, 32 (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: A131195 A020217 A141066 * A072103 A004756 A153034` `Adjacent sequences: A018193 A018194 A018195 * A018197 A018198 A018199`
	KEYWORD	`nonn`
	AUTHOR	`N. J. A. Sloane (njas(AT)research.att.com).`

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Last modified February 16 23:43 EST 2012. Contains 205978 sequences.