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1, 1, 3, 10, 35, 126, 462, 1716, 6435, 24310, 92378, 352705, 1351934, 5199117, 20050460, 77512860, 300292131, 1165534689, 4531337778, 17642948675, 68785126410, 268497991905, 1049210943531, 4104103226699, 16068342973950, 62963565243876, 246913415221671
(列表;图表;参考;听;历史;文本;内部格式)
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