A122686 List of numbers that are not the Wiener index of any tree.

2, 3, 5, 6, 7, 8, 11, 12, 13, 14, 15, 17, 19, 21, 22, 23, 24, 26, 27, 30, 33, 34, 37, 38, 39, 41, 43, 45, 47, 51, 53, 55, 60, 61, 69, 73, 77, 78, 83, 85, 87, 89, 91, 99, 101, 106, 113, 147, 159

Offset

1,1

References

M. Lepovic and I. Gutman, A collective property of trees and chemical trees, J. Chem. Inf. Comput. Sci., 38 (1998), 823-826.

Stephan G. Wagner, Hua Wang and Gang Yu. Molecular graphs and the inverse Wiener index problem. Discrete Applied Mathematics, 2009: 1544-1554.

Links

Table of n, a(n) for n=1..49.

Stephan Wagner, Graph-theoretical enumeration and digital expansions: an analytic approach, Dissertation, Fakult. f. Tech. Math. u. Tech. Physik, Tech. Univ. Graz, Austria, Feb. 2006.

Stephan Wagner, A class of trees and its Wiener index, Acta Applic. Mathem. 91 (2) (2006) 119-132.

Crossrefs

Sequence in context: A028803 A050942 A096600 * A161873 A224517 A341534

Adjacent sequences: A122683 A122684 A122685 * A122687 A122688 A122689

Keyword

nonn,fini,full

Author

N. J. A. Sloane, Sep 23 2006

Status

approved