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A003097 Critical connected topologies with n points.
(Formerly M2677)
+0
1
1, 3, 7, 20, 52, 157 (list; graph; listen)
OFFSET

2,2

REFERENCES

S. K. Das, On the enumeration of finite maximal connected topologies, J. Combin. Theory, B 15 (1973), 184-199.

CROSSREFS

Sequence in context: A111974 A066315 A058499 this_sequence A109220 A018034 A000227

Adjacent sequences: A003094 A003095 A003096 this_sequence A003098 A003099 A003100

KEYWORD

nonn

AUTHOR

njas

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Last modified July 23 17:35 EDT 2008. Contains 142285 sequences.


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