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1, 1, 1, 1, 2, 5, 12, 27, 60, 135, 309, 716, 1673, 3935, 9311, 22154, 52977, 127255, 306913, 742918, 1804301, 4395371, 10737206, 26296601, 64555741, 158825720, 391551973, 967118177, 2392964346, 5930752193, 14721605128, 36595817145, 91096419441, 227054764556, 566615061751, 1415614697677, 3540584874294, 8864485647609
(列表;图表;参考;听;历史;文本;内部格式)
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