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1, 1, 3, 11, 50, 267, 1633, 11195, 84745, 700332, 6262087, 60146704, 616841371, 6720592647, 77453291594, 940701503518, 12001369992614, 160373548837863, 2238995849944224, 32584082576638311, 493289434851850445, 7754247825363510168, 126354223534523911670, 2131014061115010861375
(列表;图表;参考;听;历史;文本;内部格式)
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