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1, 1, 1, 2, 6, 21, 112, 853, 11117, 261080, 3181, 6903, 16029, 37762, 60698, 136522, 295370, 617884, 1031444, 2148844, 4278884, 8230174, 13901726, 27183550, 50879126, 92491135, 155765543, 289049521, 515807289, 899791226, 1498906514, 2663076114, 4575392562, 7727941845, 12683646957, 21727344375, 36188012919, 59514326840, 96079635752, 159569603160
(列表;图表;参考;听;历史;文本;内部格式)
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