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A038053
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Number of labeled planted trees with 2-colored leaves.
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2
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0, 4, 12, 96, 1120, 17280, 330624, 7540736, 199544832, 6006988800, 202646118400, 7570772656128, 310240496517120, 13834761553313792, 666909048381112320, 34555424387503226880, 1915099718255940468736
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