搜索: a257699-编号:a257689
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A257698型
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| 使用此算法从n到1的步数:如果x是奇数,则为x->floor(r*x);如果x是偶数,则x->floor(x/r),其中r=3/2。 |
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+10 7
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0, 1, 3, 2, 6, 3, 5, 7, 13, 4, 6, 8, 12, 14, 16, 5, 13, 9, 11, 13, 17, 15, 17, 6, 12, 14, 16, 10, 14, 14, 16, 18, 28, 16, 18, 7, 11, 13, 15, 15, 21, 11, 13, 15, 19, 15, 17, 19, 27, 29, 31, 17, 21, 8, 10, 12, 18, 14, 16, 16, 20, 22, 24, 12, 24, 16, 18, 20, 24
(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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1,3
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链接
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例子
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5->7->10->6->4->2->1,共6步,因此a(5)=6。
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数学
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r=3/2;f[x_]:=如果[OddQ[x],楼层[r*x],楼板[x/r]]
g[x_]:=删除[FixedPointList[f,x],-1];
表[-1+长度[g[n]],{n,1,200}]
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交叉参考
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关键词
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非n,容易的
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作者
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状态
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经核准的
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A257700型
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| 使用此算法从n到1的步数:如果x是奇数,则为x->floor(r*x);如果x是偶数,则x->floor(x/r),其中r=5/3。 |
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+10 三
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0, 1, 5, 2, 4, 6, 10, 3, 11, 7, 9, 11, 17, 4, 10, 12, 14, 8, 26, 12, 16, 18, 20, 5, 9, 11, 19, 13, 15, 9, 25, 27, 37, 13, 15, 17, 23, 19, 23, 6, 8, 10, 14, 12, 18, 20, 22, 14, 32, 10, 24, 26, 28, 28, 36, 38, 42, 14, 16, 18, 22, 24, 34, 20, 22, 24, 30, 7, 13
(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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1,3
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链接
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例子
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5->8->4->2->1,共4步,因此a(5)=4。
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数学
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r=5/3;f[x_]:=如果[OddQ[x],楼层[r*x],楼板[x/r]]
g[x_]:=删除[FixedPointList[f,x],-1];
表[-1+长度[g[n]],{n,1,200}]
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交叉参考
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关键词
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非n,容易的
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作者
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状态
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经核准的
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