

A003317


Number of unlabeled minimally 2connected graphs with n nodes (also called "blocks").
(Formerly M0799)


10



1, 1, 2, 3, 6, 12, 28, 68, 184, 526, 1602, 5075, 16711, 56428, 195003, 685649, 2447882, 8850157, 32359428, 119492766, 445236635, 1672636369, 6331624545, 24138404479, 92640942148, 357805122286, 1390318899884, 5433781135206
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OFFSET

3,3


COMMENTS

The Pootheri references also contain the edge breakups for each term.


REFERENCES

A. M. Hobbs, A catalog of minimal blocks, J. Res. National Bureau Standards, B 77 (1973), 5360.
N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).


LINKS



CROSSREFS



KEYWORD

nonn,nice


AUTHOR



EXTENSIONS

More terms from Sridar K. Pootheri (sridar(AT)math.uga.edu), Feb 25 2000


STATUS

approved



