搜索: 编号:a231703
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A231703型
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| 没有元素的(n+1)X(1+1)0..1数组的数量,其水平、垂直和反对角邻域的绝大多数都等于1。 |
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+0 1
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5, 17, 42, 121, 351, 978, 2768, 7851, 22168, 62688, 177333, 501398, 1417871, 4009693, 11338691, 32064185, 90673442, 256411571, 725096165, 2050472356, 5798450868, 16397214669, 46369052496, 131125251872, 370804035439, 1048582421408
(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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1,1
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链接
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公式
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经验公式:a(n)=3*a(n-1)-a(n-2)+4*a(n-3)-8*a(4-4)+3*a(n5)-3*a(6-6)+3*a(n-7)-2*a(8-8)+a(n-9)。
经验公式:x*(5+2*x-4*x^2-8*x^3+2*x^4-x^5+x^6-x^7+x^8)/(1-3*x+x^2-4*x^3+8*x^4-3*x^5+3*x^6-3*x^7+2*x^8-x^9)-科林·巴克2018年9月30日
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例子
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n=7的一些解决方案:
..1..1....0..1....0..0....0..1....0..0....0..0....0..0....0..0....1..1....0..1
..0..0....0..0....0..0....0..0....0..0....1..0....0..1....0..1....0..0....0..0
..0..0....1..0....1..1....0..1....1..0....1..0....0..0....1..1....0..0....0..1
..0..1....1..0....0..0....0..0....0..1....0..0....1..0....0..0....1..0....0..0
..1..0....0..0....0..0....0..1....0..0....1..1....0..0....0..0....0..1....0..1
..0..0....1..0....0..0....0..1....1..0....1..0....1..0....0..0....0..0....0..0
..0..0....1..0....0..0....0..0....0..0....0..0....0..0....0..0....0..0....1..0
..0..0....1..0....0..1....0..0....1..1....1..0....0..1....0..1....0..0....0..0
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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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