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1, 2, 7, 24, 79, 258, 851, 2852, 9715, 33582, 117561, 416012, 1485787, 5348866, 19389675, 70715324, 259289563, 955277382, 3534526361, 13128240820, 48932534019, 182965127258, 686119227277, 2579808294624, 9723892802879, 36734706144278, 139067101831981
(列表;图表;参考;听;历史;文本;内部格式)
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