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0, 1, 6, 32, 169, 921, 5248, 31388, 197133, 1298804, 8962070, 64646382, 486545028, 3813611643, 31075203744, 262802902944, 2303066401903, 20883838079019, 195682855232648, 1892280736283390, 18862445424597027, 193603796552389848, 2044036227150998116, 22177186058234124636
(列表;图表;参考;听;历史;文本;内部格式)
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