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1, 1, 2, 5, 12, 27, 57, 123, 280, 666, 1614, 3955, 9733, 23949, 58967, 145844, 363137, 910339, 2295192, 5811070, 14754567, 37542078, 95715596, 244567665, 626388406, 1608131393, 4137707994, 10667045757, 27546269363, 71241831762, 184508259405, 478501423792
(列表;图表;参考;听;历史;文本;内部格式)
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