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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

N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).

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

CROSSREFS

Adjacent sequences: A003094 A003095 A003096 this_sequence A003098 A003099 A003100

Sequence in context: A111974 A066315 A058499 this_sequence A109220 A018034 A000227

KEYWORD

nonn

AUTHOR

N. J. A. Sloane (njas(AT)research.att.com).

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Last modified November 8 07:45 EST 2009. Contains 166143 sequences.


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