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1, 2, 6, 12, 26, 61, 134, 297, 669, 1490, 3321, 7426, 16573, 36986, 82594, 184382, 411599, 918931, 2051485, 4579826, 10224441, 22825825, 50957971, 113762629, 253972415, 566987102, 1265785592, 2825836529, 6308612558, 14083828826, 31441815085, 70193107041, 156704451838, 349838982690
(列表;图表;参考;听;历史;文本;内部格式)
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