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6, 36, 90, 252, 624, 1350, 3025, 6256, 12788, 25792, 50630, 99012, 190920, 365041, 694038, 1309524, 2460150, 4599952, 8565768, 15899422, 29415965, 54278252, 99908040, 183482116, 336298170, 615243752, 1123669472, 2049072321, 3731220822
(列表;图表;参考;听;历史;文本;内部格式)
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