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0, 1, 4, 18, 48, 600, 720, 35280, 40320, 362880, 3628800, 439084800, 479001600, 80951270400, 87178291200, 1307674368000, 20922789888000, 6046686277632000, 6402373705728000, 2311256907767808000, 2432902008176640000, 51090942171709440000, 1124000727777607680000
(列表;图表;参考;听;历史;文本;内部格式)
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