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1, 1, 3, 10, 47, 246, 1602, 11481, 95503, 871030, 5250758, 38454351, 273492122, 2051148347, 15736849481, 125536061475, 1041102777023, 8537848507142, 74739775725270, 569218702884915, 4674633861692302, 37899687815748825, 312237339834676391, 2586068757754063445
(列表;图表;参考;听;历史;文本;内部格式)
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