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1, 1, 3, 8, 26, 79, 276, 936, 3376, 12259, 45648, 171739, 655664, 2524835, 9813259, 38410167, 151332137, 599541153, 2387199083, 9547195445, 38335338712, 154484001619, 624579964260, 2532713370789, 10298393401623, 41979975505800, 171522040764060
(列表;图表;参考;听;历史;文本;内部格式)
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