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0, 2, 14, 32, 100, 428, 1616, 5784, 21248, 78840, 290776, 1070552, 3946728, 14554440, 53657032, 197805128, 729249064, 2688543176, 9911794984, 36541580104, 134717359592, 496660701448, 1831031342376, 6750435204552, 24886729062376
(列表;图表;参考;听;历史;文本;内部格式)
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