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1, 1, 2, 6, 10, 24, 52, 105, 238, 495, 1068, 2304, 4893, 10556, 22570, 48363, 103805, 222224, 476634, 1021515, 2189200, 4693415, 10058607, 21561120, 46215400, 99056688, 212327858, 455105352, 975492413, 2090916520, 4481729501, 9606342690, 20590584676, 44134642493, 94599971180
(列表;图表;参考;听;历史;文本;内部格式)
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