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A122686
List of numbers that are not the Wiener index of any tree.
1
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
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
KEYWORD
nonn,fini,full
AUTHOR
N. J. A. Sloane, Sep 23 2006
STATUS
approved