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A239933型 |
| 按行读取的三角形,其中第n行列出了西格玛(4n-1)的对称表示的部分。 |
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21
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2, 2, 4, 4, 6, 6, 8, 8, 8, 10, 10, 12, 12, 14, 6, 6, 14, 16, 16, 18, 12, 18, 20, 8, 8, 20, 22, 22, 24, 24, 26, 10, 10, 26, 28, 8, 8, 28, 30, 30, 32, 12, 16, 12, 32, 34, 34, 36, 36, 38, 24, 24, 38, 40, 40, 42, 42, 44, 16, 16, 44, 46, 20, 46, 48, 12, 12, 48, 50, 18, 20, 18, 50, 52, 52, 54, 54, 56, 20, 20, 56, 58, 14, 14, 58, 60, 12, 12, 60, 62, 22, 22, 62, 64, 64
(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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1,1
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评论
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第n行是sigma(4n-1)的回文组合。
第n行还列出了第三象限螺旋线第n臂中σ对称表示的部分,如A239660型,参见示例。
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链接
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例子
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不规则三角形开始于:
2, 2;
4, 4;
6, 6;
8、8、8;
10, 10;
12, 12;
14, 6, 6, 14;
16、16;
18, 12, 18;
20, 8, 8, 20;
22, 22;
24, 24;
26, 10, 10, 26;
28, 8, 8, 28;
30, 30;
32, 12, 16, 12, 32;
...
. _ _ _ _ _ _ _ _
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. | | | | | | | | | | | | | | |_|_ _
. | | | | | | | | | | | | | | 2 |_ _|
. | | | | | | | | | | | | |_|_ 2
.|||||||||||||||4|_
. | | | | | | | | | | |_|_ _ |_ _ _ _
. | | | | | | | | | | 6 |_ |_ _ _ _|
. | | | | | | | | |_|_ _ _ |_ 4
. | | | | | | | | 8 | |_ _ |
. | | | | | | |_|_ _ _ |_ | |_ _ _ _ _ _
. | | | | | | 10 | |_ |_ |_ _ _ _ _ _|
. | | | | |_|_ _ _ _ |_ _ 8 |_ _| 6
. | | | | 12 | |_ |
. | | |_|_ _ _ _ _ |_ _ | |_ _ _ _ _ _ _ _
. | | 14 | | |_ |_ _ |_ _ _ _ _ _ _ _|
. |_|_ _ _ _ _ | |_ _ |_ | 8
. 16 | |_ _ | | |
. | |_|_ |_ _ |_ _ _ _ _ _ _ _ _ _
. |_ _ 6 |_ _ | |_ _ _ _ _ _ _ _ _ _|
. | |_ | | 10
. |_ 6 | |_ _ |
.|_|__||___________________________
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. | | 12
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.| | _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ __
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. | 14
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. 16
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对于n=7,我们有4*7-1=27和第27行A237593型是[14,5,3,2,1,2,1,2,3,5,14]和第26行A237593型是[14,5,2,2,2,1,1,2,2,2,2,2,2,2,5,14],因此在两条Dyck路径之间有四个区域(或部分)大小[14,6,6,14],所以第7行是[14,16,6,14]。
27的除数之和是1+3+9+27=A000203号(27) = 40. 另一方面,sigma(27)对称表示的部分之和为14+6+6+14=40,等于27的除数之和。
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交叉参考
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囊性纤维变性。A000203号,A196020型,A236104型,A235791型,A237270型,A237271号,A237591型,A237593型,A239053型,239660英镑,A239931型,2009年2月,A239934型,A244050型,A245092型,A262626型.
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关键字
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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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