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A220829
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Number of unrooted binary leaf-multi-labeled trees with n leaves on the label set [2], with each label used at least once.
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4
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0, 1, 2, 4, 10, 27, 74, 226, 710, 2354, 8010, 28189, 101094, 370119, 1375198, 5181003, 19740940, 75990173, 295100800, 1155106357, 4553312866, 18063117153, 72069297826, 289053128879, 1164870009786, 4714970819402, 19161572076550, 78162885020942, 319940035684684, 1313799822309748
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OFFSET
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1,3
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LINKS
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FORMULA
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PROG
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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