A121221 Number of degeneracies on the sets of N ordinary trees with p vertices.

2, 2, 4, 15, 35, 137, 306, 1056, 2510, 8094, 21568, 66310, 183338, 545993, 1538831

Offset

1,1

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 5 on page 1868.

Links

Table of n, a(n) for n=1..15.

Example

If p=16 then the parameter H_lambda is 8094 which is the tenth term in the sequence. See the paper by Elena V. Konstantinova and Maxim V. Vidyuk for the definition of H_lambda.

Crossrefs

Sequence in context: A261531 A153968 A153965 * A122598 A279069 A257609

Adjacent sequences: A121218 A121219 A121220 * A121222 A121223 A121224

Keyword

nonn,uned

Author

Parthasarathy Nambi, Aug 20 2006

Status

approved