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1, 1, 2, 5, 12, 32, 82, 227, 629, 1840, 5456, 16701, 51939, 164688, 529070, 1722271, 5664786, 18813360, 62996841, 212533216, 721792751, 2466135364, 8471967927, 29249059281, 101440962284, 353289339914, 1235154230047, 4333718587339, 15255879756019, 53870521140911
(列表;图表;参考;听;历史;文本;内部格式)
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