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0, 2, 10, 46, 202, 862, 3610, 14926, 61162, 249022, 1009210, 4076206, 16422922, 66045982, 265246810, 1064175886, 4266269482, 17093775742, 68461196410, 274103065966, 1097187104842, 4391072942302, 17571265338010, 70305982058446, 281286690353002, 1125335047769662
(列表;图表;参考;听;历史;文本;内部格式)
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