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A018204
Possible numbers of complements of topologies on 13 points.
0
1, 12, 121, 1000, 2048, 4095, 6561, 8192
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OFFSET
0,2
LINKS
Table of n, a(n) for n=0..7.
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:
A337202
A299823
A222634
*
A176779
A098297
A037543
Adjacent sequences:
A018201
A018202
A018203
*
A018205
A018206
A018207
KEYWORD
nonn
,
more
AUTHOR
N. J. A. Sloane
STATUS
approved
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Last modified July 19 13:57 EDT 2024. Contains 374394 sequences. (Running on oeis4.)