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A168443号 |
| 三角形,T(n,k)=组合物的数量a(1),。。。,n的a(k),使得a(i+1)<=a(i)+1代表1<=i<k。 |
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2
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1, 1, 1, 1, 2, 1, 1, 2, 3, 1, 1, 3, 4, 4, 1, 1, 3, 6, 7, 5, 1, 1, 4, 7, 11, 11, 6, 1, 1, 4, 9, 15, 19, 16, 7, 1, 1, 5, 11, 19, 29, 31, 22, 8, 1, 1, 5, 13, 25, 39, 52, 48, 29, 9, 1, 1, 6, 15, 30, 53, 76, 88, 71, 37, 10, 1, 1, 6, 18, 37, 67, 107, 140, 142, 101, 46, 11, 1, 1, 7, 20, 44, 84, 143, 207, 245, 220, 139, 56, 12, 1
(列表;桌子;图表;参考文献;听;历史;文本;内部格式)
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抵消
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1,5
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链接
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例子
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三角形T(n,k)开始于:
1;
1, 1;
1, 2, 1;
1, 2, 3, 1;
1, 3, 4, 4, 1;
1, 3, 6, 7, 5, 1;
1, 4, 7, 11, 11, 6, 1;
1, 4, 9, 15, 19, 16, 7, 1;
...
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MAPLE公司
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b: =proc(n,k)选项记忆;展开(`if`(n=0,1,
x*加(b(n-j,j),j=1..分钟(n,k+1))
结束时间:
T: =n->(p->seq(系数(p,x,i),i=1..n))(b(n$2)):
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数学
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b[n_,k_]:=b[n,k]=展开[如果[n==0,1,
x*总和[b[n-j,j],{j,1,最小值[n,k+1]}]];
T[n]:=Rest@系数列表[b[n,n],x];
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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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状态
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经核准的
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