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0, 0, 1, 2, 4, 8, 17, 36, 83, 202, 519, 1382, 3766, 10352, 28551, 78756, 217224, 599542, 1657983, 4598766, 12803044, 35785664, 100412731, 282753476, 798690091, 2262087814, 6421507153, 18265543282, 52047980674, 148554917816, 424656556001, 1215691192244
(列表;图表;参考;听;历史;文本;内部格式)
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