搜索: 编号:a086636
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A086636号
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| 系数三角形,按行读取,其中T(n,k)是满足f(x,y)=(3-sqrt(1-4x))/2+xy*f(x、y)^3的f(x)(y)中x^n*y^k的系数。 |
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1, 1, 1, 1, 3, 3, 2, 6, 15, 12, 5, 13, 45, 84, 55, 14, 33, 120, 336, 495, 273, 42, 93, 330, 1092, 2475, 3003, 1428, 132, 280, 963, 3360, 9570, 18018, 18564, 7752, 429, 882, 2955, 10416, 33165, 81081, 129948, 116280, 43263, 1430, 2871, 9420, 33096, 110880
(列表;桌子;图表;参考;听;历史;文本;内部格式)
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0,5
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例子
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行开始:
{1},
{1,1},
{1,3,3},
{2,6,15,12},
{5,13,45,84,55},
{14,33,120,336,495,273},
{42,93,330,1092,2475,3003,1428},
{132,280,963,3360,9570,18018,18564,7752},
{429,882,2955,10416,33165,81081,129948,116280,43263}, ...
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