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.

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

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, 1860-1871. 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: A321313 A070959 A367643 * A271945 A016498 A197798

Adjacent sequences: A125063 A125064 A125065 * A125067 A125068 A125069

Keyword

nonn

Author

Parthasarathy Nambi, Jan 09 2007

Status

approved