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1, 4, 16, 40, 136, 304, 880, 1768, 4936, 9112, 25216, 45016, 121600, 212944, 571552, 982240, 2616136, 4456384, 11785408, 19922872, 52402336, 88076560, 230641504, 385875880, 1006499200, 1677720304, 4361862976, 7247738776, 18789905872, 31138512784, 80529599680, 133143986056, 343594756936
(列表;图表;参考文献;听;历史;文本;内部格式)
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