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A337255型 |
| 行读取的不规则三角形,其中T(n,k)是从n开始的严格长度k的除数链的数量。 |
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10
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1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 3, 2, 1, 1, 1, 3, 3, 1, 1, 2, 1, 1, 3, 2, 1, 1, 1, 5, 7, 3, 1, 1, 1, 3, 2, 1, 3, 2, 1, 4, 6, 4, 1, 1, 1, 1, 5, 7, 3, 1, 1, 1, 5, 7, 3, 1, 3, 2, 1, 3, 2, 1, 1, 1, 7, 15, 13, 4, 1, 2, 1, 1, 3, 2, 1, 3, 3, 1, 1, 5, 7, 3, 1, 1, 1
(列表;图表;参考;听;历史;文本;内部格式)
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抵消
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1,7
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链接
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例子
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行序列开始:
1: {1} 16: {1,4,6,4,1}
2: {1,1} 17: {1,1}
3: {1,1} 18: {1,5,7,3}
4: {1,2,1} 19: {1,1}
5: {1,1} 20: {1,5,7,3}
6: {1,3,2} 21: {1,3,2}
7: {1,1} 22: {1,3,2}
8: {1,3,3,1} 23: {1,1}
9: {1,2,1} 24: {1,7,15,13,4}
10: {1,3,2} 25: {1,2,1}
11: {1,1} 26: {1,3,2}
12: {1,5,7,3} 27: {1,3,3,1}
13: {1,1} 28: {1,5,7,3}
14: {1,3,2} 29: {1,1}
15: {1,3,2} 30: {1,7,12,6}
第n=24行统计以下链:
24 24/1 24/2/1 24/4/2/1 24/8/4/2/1
24/2 24/3/1 24/6/2/1 24/12/4/2/1
24/3 24/4/1 24/6/3/1 24/12/6/2/1
24/4 24/4/2 24/8/2/1 24/12/6/3/1
24/6 24/6/1 24/8/4/1
24/8 24/6/2 24/8/4/2
24/12 24/6/3 24/12/2/1
24/8/1 24/12/3/1
24/8/2 24/12/4/1
24/8/4 24/12/4/2
24/12/1 24/12/6/1
24/12/2 24/12/6/2
24/12/3 24/12/6/3
24/12/4
24/12/6
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MAPLE公司
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b: =proc(n)选项记忆;展开(x*(1+
加法(b(d),d=numtheory[除数](n)减去{n}))
结束时间:
T: =n->(p->seq(系数(p,x,i),i=1..度(p)))(b(n)):
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数学
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chss[n_]:=前缀[Join@@Table[Prepend[#,n]&/@chss[d],{d,Most[Divisors[n]]}],{n}];
表[长度[Select[chss[n],长度[#]==k&]],{n,30},{k,1+PrimeOmega[n]}]
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交叉参考
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关键词
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非n,标签
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作者
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状态
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经核准的
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