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1, 1, 4, 11, 40, 147, 537, 2067, 8090, 31759, 127226, 512728, 2085944, 8530109, 35108141, 145290427, 603473533, 2516899058, 10535376447, 44235546052, 186238821286, 786137476704, 3326533736676, 14104293872530, 59921599051958, 255045546995888, 1087354970834820, 4643011158411006
(列表;图表;参考;听;历史;文本;内部格式)
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