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A018198
Possible numbers of complements of topologies on 7 points.
0
1, 6, 25, 32, 63, 64, 81, 128
OFFSET
0,2
CROSSREFS
Sequence in context: A046416 A042879 A042495 * A079606 A372750 A184852
KEYWORD
nonn,more
STATUS
approved