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1, 1, 3, 10, 34, 124, 484, 1918, 7749, 32067, 134194, 568493, 2435542, 10508758, 45709216, 200171229, 881065532, 3898657609, 17330389586, 77335498887, 346384232095, 1556614155820, 7016113927071, 31710826763086, 143689626245311, 652614833648569, 2970428466894750, 13547453963340752
(列表;图表;参考;听;历史;文本;内部格式)
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