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 A125081 Number of degeneracies on the sets of n ordinary trees with n vertices. These are the values of the Wiener number, W, in Table 15 of the paper by Elena V. Konstantinova and Maxim V. Vidyuk. 0
 4, 6, 39, 83, 221, 528, 1286, 3131, 7724, 19289, 48610, 123832, 317932, 823029, 2144486 (list; graph; refs; listen; history; text; internal format)
 OFFSET 7,1 COMMENTS See Equation 2 on page 1861 of the paper by Elena V. Konstantinova and Maxim V. Vidyuk. REFERENCES Elena V. Konstantinova and Maxim V. Vidyuk, "Discriminating tests of information and topological indices. Animals and trees", J. Chem. Inf. Comput. Sci., (2003), vol. 43, 1860-1871. See Table 15, column 13 on page 1868. LINKS Table of n, a(n) for n=7..21. EXAMPLE If n=7 then the value of the Wiener number, W, is 4. If n=8 then the value of the Wiener number, W, is 6. If n=9 then the value of the Wiener number, W, is 39. If n=10 then the value of the Wiener number, W, is 83. CROSSREFS Cf. A121223. Sequence in context: A056315 A103234 A074061 * A175349 A281223 A023644 Adjacent sequences: A125078 A125079 A125080 * A125082 A125083 A125084 KEYWORD nonn AUTHOR Parthasarathy Nambi, Jan 09 2007 STATUS approved

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Last modified June 2 07:25 EDT 2023. Contains 363081 sequences. (Running on oeis4.)