A018198 - OEIS

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A018198

Possible numbers of complements of topologies on 7 points.

1, 6, 25, 32, 63, 64, 81, 128 (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: A046416 A042879 A042495 * A079606 A184852 A067926` `Adjacent sequences: A018195 A018196 A018197 * A018199 A018200 A018201`
	KEYWORD	`nonn`
	AUTHOR	`N. J. A. Sloane (njas(AT)research.att.com).`

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Last modified February 17 08:40 EST 2012. Contains 205998 sequences.