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0, 1, 2, 9, 68, 710, 9414, 151032, 2840648, 61247664, 1488691530, 40262372480, 1199047315212, 38984874829056, 1373954963380622, 52171222364513280, 2123286652815757200, 92201888436661409792, 4255016114128163220882, 207954945060162884960256
(列表;图表;参考;听;历史;文本;内部格式)
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