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1, 8, 23, 61, 185, 562, 1677, 4998, 14968, 44818, 134061, 401123, 1200360, 3591843, 10747770, 32160619, 96234620, 287963368, 861674203, 2578393448, 7715343389, 23086669802, 69082386936, 206715662599, 618556579000, 1850910743566
(列表;图表;参考;听;历史;文本;内部格式)
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