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1, 0, 270, 960, 5725, 18304, 64150, 178240, 502630, 1257600, 3108856, 7163200, 16219955, 35048320, 74331550, 152459008, 307296950, 603802880, 1167637650, 2212721600, 4133756892, 7594956800, 13776792930, 24641263360, 43571462525, 76116608128, 131607454150
(列表;图表;参考;听;历史;文本;内部格式)
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