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1, 6, 71, 846, 10081, 120126, 1431431, 17057046, 203253121, 2421980406, 28860511751, 343904160606, 4097989415521, 48831968825646, 581885636492231, 6933795669081126, 82623662392481281, 984550153040694246, 11731978174095849671, 139799187936109501806
(列表;图表;参考;听;历史;文本;内部格式)
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