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A122684 Sum of all Wiener indices of "chemical" trees described by A000602(n). +0
1
0, 1, 4, 19, 54, 155, 432, 1252, 3384, 9714 (list; graph; listen)
OFFSET

1,3

REFERENCES

S. Wagner, Graph-theoretical enumeration and digital expansions: an analytic approach, Dissertation, Fakult. f. Tech. Math. u. Tech. Physik, Tech. Univ. Graz, Austria, Feb., 2006.

CROSSREFS

Sequence in context: A138617 A159833 A166808 this_sequence A122681 A020496 A108484

Adjacent sequences: A122681 A122682 A122683 this_sequence A122685 A122686 A122687

KEYWORD

nonn

AUTHOR

N. J. A. Sloane (njas(AT)research.att.com), Sep 23 2006

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Last modified December 6 22:55 EST 2009. Contains 170429 sequences.


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