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A121221 Number of degeneracies on the sets of N ordinary trees with p vertices. 0
2, 2, 4, 15, 35, 137, 306, 1056, 2510, 8094, 21568, 66310, 183338, 545993, 1538831 (list; graph; refs; listen; history; text; internal format)
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

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Last modified December 8 01:51 EST 2022. Contains 358672 sequences. (Running on oeis4.)