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A152969号 |
| 按行读取三角形:T(n,m)=楼层[(m/n)*行(n)]。 |
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1, 1, 1, 1, 6, 1, 1, 23, 23, 1, 1, 48, 286, 48, 1, 1, 384, 1535, 1535, 384, 1, 1, 3840, 7680, 23038, 7680, 3840, 1, 1, 46080, 92160, 184319, 184319, 92160, 46080, 1, 1, 645120, 1290240, 1935360, 2580478, 1935360, 1290240, 645120, 1, 1, 10321920, 20643840
(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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0,5
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评论
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链接
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例子
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{1},
{1, 1},
{1, 6, 1},
{1, 23, 23, 1},
{1, 48, 286, 48, 1},
{1, 384, 1535, 1535, 384, 1},
{1, 3840, 7680, 23038, 7680, 3840, 1},
{1, 46080, 92160, 184319, 184319, 92160, 46080, 1},
{1, 645120, 1290240, 1935360, 2580478, 1935360, 1290240, 645120, 1},
{1, 10321920, 20643840, 30965760, 30965759, 30965759, 30965760, 20643840, 10321920, 1},
{1, 185794560, 371589120, 557383680, 743178240, -2, 743178240, 557383680, 371589120, 185794560, 1}
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数学
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清除[v,n,row,f];行[n_]=2^n*n!;
f[n_,m_]=楼层[(m/n)*行[n]/2];v[0]={1};v[1]={1,1};
v[n_]:=v[n]=如果[Mod[n,2]==0,连接[{1},表[f[n,m],{m,1,楼层[n/2]-1}],{row[n]-2*总和[f[n],{m],1,楼板[n/2]-1}]-2},
连接[{1},表[f[n,m],{m,1,楼层[n/2]-1}],{row[n]/2-总和[f[n,m],}m,1、楼层[n/2]-1}]-1,行[n]/2-总和[f[n,m],{m,1,楼板[n/2]-1}]-1},表格[f[n,m]、{m,楼层[n/2]-1,1,-1}]、{1}]];
表[v[n],{n,0,10}];压扁[%]
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交叉参考
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关键词
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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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