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0, 1, 1, 3, 9, 33, 129, 531, 2265, 9921, 44361, 201651, 929073, 4328865, 20362137, 96562659, 461169873, 2216134401, 10707788721, 51988771107, 253515373305, 1241069449377, 6097106216529, 30050252046195, 148541591990505, 736237012296897
(列表;图表;参考;听;历史;文本;内部格式)
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