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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
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.
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
KEYWORD
nonn
AUTHOR
Parthasarathy Nambi, Jan 09 2007
STATUS
approved