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0, 0, 0, 0, 1, 4, 16, 25, 36, 144, 324, 1849, 6400, 23716, 36481, 51984, 207936, 467856, 2666689, 9229444, 34199104, 52606009, 74960964, 299843856, 674648676, 3845364121, 13308852496, 49315084900, 75857828929, 108093658176, 432374632704, 972842923584, 5545012396225, 19191356070436, 71112318227344, 109386936710041, 155870980128900, 623483920515600,1402838821160100
(列表;图表;参考;听;历史;文本;内部格式)
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