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A121942
Number of digraphs of hydrogen bonded water clusters.
1
1, 5, 22, 161, 1406, 14241, 164461, 2115335, 29903139, 460066726, 7644586673, 136336779596, 2596190669230, 52552267768902, 1126421027176730
OFFSET
2,2
REFERENCES
T. Miyake and M. Aida, "Enumeration of topology-distinct structures of hydrogen bonded water clusters", Chem. Phys. Lett., vol. 363 (2002) pp. 106-110. See Table 1 column 3 on page 109.
LINKS
B. Brinkmann, Generating water clusters and other directed graphs, J. Math. Chem. 46 (4) (2009) 1112-1121, Table 1.
EXAMPLE
If n=5 then the number of digraphs of hydrogen bonded water clusters is 161.
CROSSREFS
Sequence in context: A227918 A009638 A346410 * A006294 A239982 A129437
KEYWORD
nonn
AUTHOR
Parthasarathy Nambi, Sep 03 2006
EXTENSIONS
More terms copied from Brinkmann's table. - R. J. Mathar, Mar 27 2019
STATUS
approved