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1, 5, 22, 95, 406, 1730, 7360, 31295, 133030, 565430, 2403172, 10213670, 43408444, 184486580, 784069252, 3332296895, 14162266630, 60189642830, 255806000260, 1087175537570, 4620496103956, 19637108580380, 83457711731152, 354695275386470, 1507454921406556
(列表;图表;参考;听;历史;文本;内部格式)
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