A121942 Number of digraphs of hydrogen bonded water clusters.

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

Table of n, a(n) for n=2..16.

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

Adjacent sequences: A121939 A121940 A121941 * A121943 A121944 A121945

Keyword

nonn

Author

Parthasarathy Nambi, Sep 03 2006

Extensions

More terms copied from Brinkmann's table. - R. J. Mathar, Mar 27 2019

Status

approved