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A122684
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Sum of all Wiener indices of "chemical" trees described by A000602(n).
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0
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0, 1, 4, 19, 54, 155, 432, 1252, 3384, 9714, 26752, 75836, 213058, 603791, 1702868, 4830747, 13666890, 38742120, 109715858, 310884129, 880368618, 2493252951, 7058102770, 19978082407, 56531061316, 159932660960, 452354328946, 1279190479845, 3616595649500
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,3
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COMMENTS
| C program, see the first Bomfim link, around the function Gen() of Gang Li & Frank Ruskey.
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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.
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LINKS
| W. Bomfim, C program
Stephan Wagner, On the average Wiener index of degree-restricted trees
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CROSSREFS
| Sequence in context: A159833 A166808 A186310 * A122681 A174612 A020496
Adjacent sequences: A122681 A122682 A122683 * A122685 A122686 A122687
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KEYWORD
| nonn
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AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com), Sep 23 2006
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EXTENSIONS
| a(11)-a(29) from W. Bomfim, Feb 24 2011
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