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1, 2, 10, 66, 490, 3898, 32482, 279882, 2473362, 22294194, 204174842, 1894462354, 17771064186, 168254374890, 1605751354066, 15431016952730, 149191682979874, 1450182228623458, 14163576408858346, 138924886089370082, 1367918804901854218, 13516246001650813338, 133977227356098512834
(列表;图表;参考;听;历史;文本;内部格式)
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