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Search: id:A058380
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| A058380 |
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Essentially series series-parallel networks with n labeled edges, multiple edges not allowed. |
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+0
6
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| 0, 0, 1, 1, 13, 66, 796, 8338, 122326, 1893748, 34717076, 695343144, 15560613872, 379211091416, 10070672083928, 288420300817184, 8877044175277216, 291944826030636000, 10221726849956763136, 379528960298122277536, 14896869800297864928736
(list; graph; listen)
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OFFSET
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0,5
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REFERENCES
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J. W. Moon, Some enumerative results on series-parallel networks, Annals Discrete Math., 33 (1987), 199-226 (the sequence R_n).
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LINKS
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Index entries for sequences mentioned in Moon (1987)
S. R. Finch, Series-parallel networks
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FORMULA
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E.g.f. satisfies A(x) = A058379(x) - log(1+x).
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CROSSREFS
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Cf. A058379, A058381.
Sequence in context: A147075 A109727 A041320 this_sequence A129746 A067863 A106975
Adjacent sequences: A058377 A058378 A058379 this_sequence A058381 A058382 A058383
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KEYWORD
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nonn,nice,easy
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AUTHOR
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N. J. A. Sloane (njas(AT)research.att.com), Dec 19 2000
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