

A125066


Number of degeneracies on the sets of n ordinary trees with n vertices. These are the values of the information index, (I^w)_D, in Table 15 of the paper by Elena V. Konstantinova and Maxim V. Vidyuk.


0



4, 4, 39, 58, 214, 502, 1621, 3958, 12295, 30962, 91967, 245143, 720699
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OFFSET

9,1


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, 18601871. See Table 15, column 9 on page 1868.


LINKS

Table of n, a(n) for n=9..21.


EXAMPLE

If n=9 then the value of the information index, (I^w)_D, is 4.
If n=10 then the value of the information index, (I^w)_D, is 4.
If n=11 then the value of the information index, (I^w)_D, is 39.
If n=12 then the value of the information index, (I^w)_D, is 58.


CROSSREFS

Cf. A121223.
Sequence in context: A111882 A321313 A070959 * A271945 A016498 A197798
Adjacent sequences: A125063 A125064 A125065 * A125067 A125068 A125069


KEYWORD

nonn


AUTHOR

Parthasarathy Nambi, Jan 09 2007


STATUS

approved



