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1, 1, 2, 6, 14, 33, 79, 188, 448, 1068, 2545, 6065, 14454, 34446, 82090, 195633, 466223, 1111080, 2647872, 6310280, 15038353, 35838673, 85408986, 203542550, 485072726, 1156001777, 2754927327, 6565409092, 15646364288, 37287655956, 88862131873
(列表;图表;参考;听;历史;文本;内部格式)
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