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 A125068 Number of degeneracies on the sets of n ordinary trees with n vertices. These are the values of the Randic index, 'chi', in Table 15 of the paper by Elena V. Konstantinova and Maxim V. Vidyuk. 0
 4, 14, 45, 128, 368, 979, 2601, 6776, 17641, 45690, 118956, 309482, 808323, 2119187 (list; graph; refs; listen; history; text; internal format)
 OFFSET 8,1 COMMENTS See Equation 6 on page 1862. 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 11 on page 1868. LINKS EXAMPLE If n=8 then the value of the Randic index, 'chi', is 4. If n=9 then the value of the Randic index, 'chi', is 14. If n=10 then the value of the Randic index, 'chi', is 45. If n=11 then the value of the Randic index, 'chi', is 128. CROSSREFS Cf. A121223. Sequence in context: A047115 A356726 A208666 * A184138 A318019 A182902 Adjacent sequences: A125065 A125066 A125067 * A125069 A125070 A125071 KEYWORD nonn AUTHOR Parthasarathy Nambi, Jan 09 2007 STATUS approved

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Last modified March 21 08:05 EDT 2023. Contains 361393 sequences. (Running on oeis4.)