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1, 2, 8, 52, 340, 2120, 12966, 78404, 471049, 2819296, 16836187, 100413044, 598466970, 3565829520, 21245133183, 126592343380, 754484832586, 4497987650048, 26824346741653, 160027308774544, 955033911144732, 5701712685169392, 34052840254416123, 203451441144122916
(列表；图表；参考；听；历史；文本；内部格式)
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