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A018201 Possible numbers of complements of topologies on 10 points. +0
1
1, 9, 64, 256, 343, 511, 1024 (list; graph; listen)
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: A016886 A099761 A092396 this_sequence A000444 A143631 A083328

Adjacent sequences: A018198 A018199 A018200 this_sequence A018202 A018203 A018204

KEYWORD

nonn

AUTHOR

N. J. A. Sloane (njas(AT)research.att.com).

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Last modified November 27 22:38 EST 2009. Contains 167602 sequences.


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