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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

%I #2 Mar 30 2012 17:25:50

%S 4,14,45,128,368,979,2601,6776,17641,45690,118956,309482,808323,

%T 2119187

%N 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.

%C See Equation 6 on page 1862.

%D 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.

%e If n=8 then the value of the Randic index, 'chi', is 4.

%e If n=9 then the value of the Randic index, 'chi', is 14.

%e If n=10 then the value of the Randic index, 'chi', is 45.

%e If n=11 then the value of the Randic index, 'chi', is 128.

%Y Cf. A121223.

%K nonn

%O 8,1

%A _Parthasarathy Nambi_, Jan 09 2007

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