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1, 1, 1, 2, 3, 7, 16, 48, 157, 586, 2362, 10214, 46672, 223752, 1118799, 5810185, 31237145, 173412537, 992006284, 5837461604, 35283954583, 218791917313, 1390314155401, 9044905749879, 60190822583318, 409404760891303, 2844213921090065, 20168470493811065, 145888129690256442, 1075859539461621404, 8084389249391405645, 61869341164985700882, 481984158600673224200
(列表;图表;参考文献;听;历史;文本;内部格式)
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