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| A197499号 |
| nX4 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, 53, 181, 967, 4447, 20411, 99367, 473509, 2249979, 10740561, 51245685, 244406613, 1165674879, 5559988993, 26520385505, 126494970513, 603345410731, 2877810161871, 13726438785461, 65471603280973, 312282907797439
(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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配方奶粉
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经验公式：a（n）=2*a（n-1）+6*a（n-2）+32*a（n3）+27*a（4-4）-9*a（5-5）-247*a n-17）-196*a（n-18）+2441*a（n-19）+3336*a+312*a（n-27）+210*a
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例子
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对于n=5，一些包含所有值0到4的解
..0..0..0..0....0..0..1..2....0..0..0..0....0..0..0..0....0..0..0..0
..1..0..4..0....1..1..3..1....1..0..4..0....0..4..0..0....0..0..4..0
..3..1..0...0...3..1..0...0...3...0...0...0...0...1...0...0...1...0...0...0...1
..1..0..1..0....1..0..4..0....1..1..3..1....0..0..3..1....3..1..1..3
..2..1..3..1....0..0..0..0....0..0..1..2....0..0..1..2....1..2..2..1
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交叉参考
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关键词
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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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