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0, 0, 1, 3, 6, 15, 33, 74, 160, 344, 731, 1544, 3237, 6753, 14022, 29009, 59819, 123010, 252341, 516560, 1055476, 2153115, 4385889, 8922556, 18131000, 36805009, 74643126, 151255021, 306267833, 619719217, 1253191291, 2532750315, 5116124712, 10329574480
(列表;图表;参考;听;历史;文本;内部格式)
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