A125069 Number of degeneracies on the sets of n ordinary trees with n vertices. These are the values of the Schultz molecular topological index, MTI, in Table 15 of the paper by Elena V. Konstantinova and Maxim V. Vidyuk.

6, 19, 59, 184, 495, 1259, 3105, 7684, 19251, 48561, 123800, 317883, 822980, 2144429

Offset

8,1

Comments

See Equation 4 on page 1861 for a definition of MTI.

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 12 on page 1868.

Links

Table of n, a(n) for n=8..21.

Example

If n=8 then the value of the Schultz molecular topological index, MTI, is 6.
If n=9 then the value of the Schultz molecular topological index, MTI, is 19.
If n=10 then the value of the Schultz molecular topological index, MTI, is 59.
If n=11 then the value of the Schultz molecular topological index, MTI, is 184.

Crossrefs

Cf. A121223.

Sequence in context: A238055 A272227 A272587 * A080926 A184189 A152098

Adjacent sequences: A125066 A125067 A125068 * A125070 A125071 A125072

Keyword

nonn

Author

Parthasarathy Nambi, Jan 09 2007

Status

approved