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1, 1, 2, 4, 6, 13, 19, 42, 74, 148, 222, 518, 740, 1628, 3108, 6216, 9324, 21534, 30858, 72668, 134384, 259444, 393828, 928256, 1581528, 3163056, 6066668, 12392780, 18459448, 43245008, 61704456, 145031416, 268440328, 518421208, 993597408
(列表;图表;参考;听;历史;文本;内部格式)
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