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0, 2, 4, 10, 20, 44, 88, 182, 364, 740, 1484, 2990, 5992, 12030, 24092, 48278, 96628, 193458, 387052, 774486, 1549220, 3099106, 6198632, 12398466, 24797384, 49596654, 99193464, 198389538, 396777716, 793557898, 1587108968, 3174217032, 6348411948, 12696809070
(列表;图表;参考;听;历史;文本;内部格式)
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