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A197498号 |
| nX3 0..4数组的数量,其中每个元素x等于其水平和垂直邻域的数量,x=0,1,2,3,4时等于2,3,1,0 |
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1
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1, 9, 22, 53, 162, 526, 1605, 5011, 15073, 46562, 143487, 440836, 1353988, 4162099, 12795741, 39330623, 120882310, 371559669, 1142099870, 3510484802, 10790188695, 33166049781, 101943428843, 313345715556, 963137000727, 2960415365620
(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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1,2
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评论
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每个0紧挨着0 2,每个1紧挨着1 3,每个2紧挨着2 1,每个3紧挨着3 1,每个4紧挨着4 0
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链接
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公式
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经验公式:a(n)=a(n-1)+2*a(n-2)+7*a(n-3)+15*a(-n4)+15*a(n-5)+6*a a(n-19)-14*a(n-20)-8*a(n-21)
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例子
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n=4的一些解
..0..0..1....0..0..1....2..1..2....0..1..2....0..0..0....0..0..0....1..3..1
..0..1..3....0..1..3....1..3..1....1..3..1....0..0..0....0..1..0....2..1..2
..0..1..1....0..0..1....0..0..0....1..3..1....1..3..1....0..3..1....2..1..2
..1..3..1....0..0..0....0..0..0....0..1..2....0..1..0....0..1..2....1..3..1
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交叉参考
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关键字
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非n
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作者
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状态
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经核准的
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