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1, 1, 3, 6, 21, 32, 174, 236, 1310, 2609, 12579, 18150, 150980, 198821, 1471346, 2645433, 17956158, 24534384, 234506155, 304507520, 2773986000, 4315363549, 36311714888, 47769153478, 500399410005, 637747787407, 6468558255893, 9142971548460, 88936892205131
(列表;图表;参考;听;历史;文本;内部格式)
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