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A058478
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Total number of interior nodes in all essentially series series-parallel networks with n labeled edges, multiple edges allowed.
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3
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0, 0, 1, 5, 46, 534, 7596, 127756, 2479856, 54560512, 1341716960, 36468949824, 1085680795200, 35131589529152, 1227777836217856, 46086892351150592, 1849266301464495616, 78990342571085637120, 3578513340735623076864
(list; graph; refs; listen; history; internal format)
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