login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A125067 Number of degeneracies on the sets of n ordinary trees with n vertices. These are the values of the average distance sum connectivity index, J, in Table 15 of the paper by Elena V. Konstantinova and Maxim V. Vidyuk. 0
2, 2, 28, 22, 265, 258, 2217, 2192, 17453, 18378, 134508, 149854 (list; graph; refs; listen; history; text; internal format)
OFFSET

10,1

COMMENTS

See Equation 5 on page 1861 of the paper by Elena V. Konstantinova and Maxim V. Vidyuk.

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 10 on page 1868.

LINKS

Table of n, a(n) for n=10..21.

EXAMPLE

If n=10 then the value of the average distance sum connectivity index, J, is 2.

If n=11 then the value of the average distance sum connectivity index, J, is 2.

If n=12 then the value of the average distance sum connectivity index, J, is 28.

If n=13 then the value of the average distance sum connectivity index, J, is 22.

CROSSREFS

Cf. A121223.

Sequence in context: A288208 A024577 A121222 * A193618 A246062 A178955

Adjacent sequences:  A125064 A125065 A125066 * A125068 A125069 A125070

KEYWORD

nonn

AUTHOR

Parthasarathy Nambi, Jan 09 2007

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified June 15 13:25 EDT 2021. Contains 345048 sequences. (Running on oeis4.)