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1, 3, 6, 10, 15, 21, 28, 36, 45, 1, 2, 4, 7, 11, 16, 22, 29, 37, 46, 3, 4, 6, 9, 13, 18, 24, 31, 39, 48, 6, 7, 9, 12, 16, 21, 27, 34, 42, 51, 10, 11, 13, 16, 20, 25, 31, 38, 46, 55, 15, 16, 18, 21, 25, 30, 36, 43, 51, 60, 21, 22, 24, 27, 31, 36, 42, 49, 57, 66, 28, 29, 31, 34, 38, 43, 49, 56, 64, 73, 36, 37, 39, 42, 46, 51, 57, 64, 72, 81
(列表;图表;参考;听;历史;文本;内部格式)
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