|
| |
|
|
A125081
|
|
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.
|
|
0
| |
|
|
4, 6, 39, 83, 221, 528, 1286, 3131, 7724, 19289, 48610, 123832, 317932, 823029, 2144486
(list; graph; refs; listen; history; internal format)
|
|
|
|
OFFSET
| 7,1
|
|
|
COMMENTS
| See Equation 2 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 13 on page 1868.
|
|
|
EXAMPLE
| If n=7 then the value of the Wiener number, W, is 4.
If n=8 then the value of the Wiener number, W, is 6.
If n=9 then the value of the Wiener number, W, is 39.
If n=10 then the value of the Wiener number, W, is 83.
|
|
|
CROSSREFS
| Cf. A121223.
Sequence in context: A056315 A103234 A074061 * A175349 A023644 A145387
Adjacent sequences: A125078 A125079 A125080 * A125082 A125083 A125084
|
|
|
KEYWORD
| nonn
|
|
|
AUTHOR
| Parthasarathy Nambi (PachaNambi(AT)yahoo.com), Jan 09 2007
|
| |
|
|
