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A058477
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Total number of multiple edges in all essentially series series-parallel networks with n labeled edges, multiple edges allowed.
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0
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0, 0, 0, 3, 20, 225, 3074, 50365, 958880, 20786745, 505233986, 13603353929, 401819713272, 12917450788957, 448922610588490, 16770152528046333, 670096317408222528, 28517474585339343409, 1287722135213121579202
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OFFSET
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0,4
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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 e.g.f. M_S(x)).
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LINKS
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FORMULA
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E.g.f. = e.g.f. for A058476 - (exp(-x)-1+x).
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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