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2, 6, 15, 105, 385, 1001, 17017, 323323, 7436429, 19605131, 86822723, 3212440751, 131710070791, 5663533044013, 266186053068611, 613385252723321, 2783825377744303, 5855632691117327, 392327390304860909, 27855244711645124539, 2033432863950094091347, 160641196252057433216413
(列表;图表;参考;听;历史;文本;内部格式)
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