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1, 1, 0, 1, 1, 2, 3, 6, 10, 21, 41, 87, 187, 423, 971, 2324, 5668, 14224, 36506, 95880, 257081, 703616, 1962887, 5578529, 16137942, 47492141, 142093854, 432001458, 1333937382, 4181500703, 13301265585, 42918900353, 140423545125, 465712099790, 1565092655597
(列表;图表;参考;听;历史;文本;内部格式)
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