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A018200
Possible numbers of complements of topologies on 9 points.
0
1, 8, 49, 128, 216, 255, 512
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OFFSET
0,2
LINKS
Table of n, a(n) for n=0..6.
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:
A304468
A272713
A316285
*
A306049
A317226
A329051
Adjacent sequences:
A018197
A018198
A018199
*
A018201
A018202
A018203
KEYWORD
nonn
,
more
AUTHOR
N. J. A. Sloane
STATUS
approved
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Last modified June 13 02:24 EDT 2024. Contains 373366 sequences. (Running on oeis4.)
