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A018197
Possible numbers of complements of topologies on 6 points.
0
1, 5, 16, 27, 31, 64
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OFFSET
0,2
LINKS
Table of n, a(n) for n=0..5.
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:
A171787
A227586
A335416
*
A061874
A341006
A017449
Adjacent sequences:
A018194
A018195
A018196
*
A018198
A018199
A018200
KEYWORD
nonn
,
more
AUTHOR
N. J. A. Sloane
.
STATUS
approved
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Last modified May 16 16:26 EDT 2024. Contains 372554 sequences. (Running on oeis4.)
