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1, 1, 2, 4, 10, 22, 59, 149, 396, 1041, 2907, 7760, 21816, 60298, 169741, 475054, 1359128, 3816950, 10972685, 31304334, 89879700, 257711500, 747124581, 2144777317, 6229523512, 18035524556, 52361269786, 152014079572, 443837403206, 1288731108002, 3768163857728, 11001149176426, 32145852887328
(列表;图表;参考;听;历史;文本;内部格式)
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