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A291953
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Number of unordered pairs of edge-disjoint trees on n labeled vertices.
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1
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1, 0, 0, 6, 570, 73620, 13675620, 3540401760, 1229855690952, 554518177819200, 315663337023994080, 221736991132524890880, 188570961922698640977120, 191056359142016559185938944, 227491517759156008014967128000
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OFFSET
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1,4
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LINKS
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FORMULA
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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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