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%I #2 Mar 30 2012 17:25:50
%S 4,6,39,83,221,528,1286,3131,7724,19289,48610,123832,317932,823029,
%T 2144486
%N 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.
%C See Equation 2 on page 1861 of the paper by Elena V. Konstantinova and Maxim V. Vidyuk.
%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 13 on page 1868.
%e If n=7 then the value of the Wiener number, W, is 4.
%e If n=8 then the value of the Wiener number, W, is 6.
%e If n=9 then the value of the Wiener number, W, is 39.
%e If n=10 then the value of the Wiener number, W, is 83.
%Y Cf. A121223.
%K nonn
%O 7,1
%A _Parthasarathy Nambi_, Jan 09 2007