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1, 2, 4, 2, 4, 6, 3, 6, 9, 12, 2, 4, 6, 8, 10, 4, 8, 12, 16, 20, 24, 2, 4, 6, 8, 10, 12, 14, 4, 8, 12, 16, 20, 24, 28, 32, 3, 6, 9, 12, 15, 18, 21, 24, 27, 4, 8, 12, 16, 20, 24, 28, 32, 36, 40, 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 6, 12, 18, 24, 30, 36, 42, 48, 54, 60, 66, 72
(列表;桌子;图表;参考;听;历史;文本;内部格式)
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抵消
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1,2
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评论
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行总和=A143272号: (1, 6, 12, 30, 30, 84, 56, ...).
左边框=A000005号: (1, 2, 2, 3, 2, 4, 2, 4, 3, ...).
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链接
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配方奶粉
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T(n,k)=d(n)*k。
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例子
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三角形的前几行=
1;
2, 4;
2, 4, 6;
3, 6, 9, 12;
2, 4, 6, 8, 10;
4, 8, 12, 16, 20, 24;
2, 4, 6, 8, 10, 12, 14;
...
T(5,3)=6=2*3=d(5)*3。
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黄体脂酮素
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(PARI)tabl(nn)=表示(n=1,nn,表示(k=1,n,print1(numdiv(n)*k,“,”))\\米歇尔·马库斯,2023年6月5日
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交叉参考
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关键字
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作者
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扩展
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状态
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经核准的
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