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0, 1, 1, 2, 3, 7, 16, 41, 105, 274, 715, 1871, 4896, 12817, 33553, 87842, 229971, 602071, 1576240, 4126649, 10803705, 28284466, 74049691, 193864607, 507544128, 1328767777, 3478759201, 9107509826, 23843770275, 62423800999, 163427632720, 427859097161
(列表;图表;参考;听;历史;文本;内部格式)
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