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1, 2, 4, 9, 22, 56, 148, 402, 1112, 3118, 8832, 25205, 72342, 208560, 603404, 1750785, 5092046, 14839710, 43321976, 126661355, 370813762, 1086877792, 3189091724, 9366371000, 27533212140, 81001276874, 238478223648, 702592110803, 2071257446234, 6109731270056
(列表;图表;参考;听;历史;文本;内部格式)
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