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1, 1, 3277, 478297, 15790321, 234750601, 2117950381, 13564461457, 67662254017, 278985273841, 990099009901, 3112703553961, 8854610100337, 23161037562937, 56406126018061, 129172239050401, 280379743338241, 580613195032417, 1153271900252557, 2207200789455481
(列表;图表;参考文献;听;历史;文本;内部格式)
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