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1, 5, 18, 63, 224, 799, 2846, 10132, 36073, 128438, 457304, 1628224, 5797263, 20641062, 73492179, 261667749, 931663897, 3317174627, 11810748015, 42051982296, 149725420655, 533095002085, 1898076358760, 6758070980980, 24062005289281, 85672390859855
(列表;图表;参考;听;历史;文本;内部格式)
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