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A307027型 |
| 完全二部图K_{m,n}(由m=1..n和n=1..行读取的三角形)中的(无向)路径数。 |
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1
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1, 3, 12, 6, 33, 135, 10, 72, 438, 2224, 15, 135, 1140, 8850, 55725, 21, 228, 2511, 27480, 265665, 2006316, 28, 357, 4893, 70462, 962010, 11158203, 98309827, 36, 528, 8700, 156768, 2818740, 46176816, 624859788, 6291829440, 45, 747, 14418, 313434, 7054875, 152212365, 2909139912
(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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1,2
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链接
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配方奶粉
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a(1,n)=二项式(n+1,2)。
a(2,n)=n*(n^2+2)。
a(3,n)=3/2*n*(-3+11*n-6*n^2+2*n^3)。
a(4,n)=2*n*(70-152*n+123*n^2-42*n^3+6*n^4)。
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例子
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1;
3,12;
6,33,135;
10,72,438,2224;
15,135,1140,8850,55725;
21,228,2511,27480,265665,2006316;
28,357,4893,70462,962010,11158203,98309827;
36,528,8700,156768,2818740,46176816,624859788,6291829440;
45,747,14418,313434,7054875,152212365,2909139912,...;
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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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