搜索: 编号:a248432
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A248432型
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| 长度为n+20..7的数组的数目,其中每三个连续项的两个元素之和等于第三个元素的两倍。 |
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+0 1
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80, 140, 252, 462, 884, 1684, 3200, 6216, 11944, 22810, 44396, 85402, 163204, 317716, 611248, 1168198, 2274196, 4375320, 8362052, 16278784, 31318664, 59855842, 116523764, 224179214, 428448488, 834077068, 1604674164, 3066832822
(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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配方奶粉
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经验:a(n)=a(n-1)+10*a(n-3)-10*a(n-4)-22*a(n6)+22*a。
经验公式:2*x*(40+30*x+56*x^2-295*x^3-89*x^4-160*x^5+588*x^6+58*x^7+96*x^8-317*x^9-9*x^11-27*x^12)/((1-x)*(1-10*x^3+22*x^6-12*x^9+x^12-科林·巴克2018年11月8日
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例子
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n=6的一些解决方案:
..6....6....0....4....2....3....4....6....4....3....2....4....5....2....3....4
..4....2....3....2....3....1....6....4....2....5....3....2....3....4....5....5
..5….4….6….0….4….2….5….5….3….4….1….6….7….3….7….3
..3....0....0....4....5....0....4....3....1....6....5....4....5....5....6....7
..7....2....3....2....3....1....3....1....2....2....3....5....3....4....5....5
..5....4....6....3....7....2....2....2....0....4....7....3....4....3....7....6
..3....6....0....1....5....0....4....0....1....3....5....1....5....5....3....4
..1....5....3....5....6....1....3....1....2....2....3....5....6....4....5....2
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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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