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1, 1, 4, 14, 56, 237, 1036, 4603, 20951, 96544, 448844, 2106027, 9950648, 47254566, 225457864, 1080095458, 5191016887, 25019333735, 120895386015, 585447565802, 2840483620046, 13805374592905, 67200268124866, 327556541371822, 1598606372758210, 7810659910922604, 38201283093553175, 187014395949907268
(列表;图表;参考;听;历史;文本;内部格式)
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