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4, 6, 18, 34, 86, 180, 426, 930, 2140, 4758, 10818, 24240, 54834, 123274, 278260, 626446, 1412746, 3182416, 7174106, 16164834, 36434260, 82103270, 185041218, 417002816, 939796802, 2117936730, 4773120596, 10756848350, 24242204506
(列表;图表;参考;听;历史;文本;内部格式)
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