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A252827型 |
| n X 7个非负整数数组的数量,左上角为0,每个值在距左上角城市街区距离的3以内,每个值随着向右或向下每一步增加0或1。 |
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42, 729, 10761, 125892, 1165921, 8807722, 55960651, 306796310, 1481748658, 6411737114, 25203579317, 91037124979, 305083525901, 956286103952, 2823092600299, 7895877354183, 21029532417878, 53571661955209
(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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评论
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链接
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配方奶粉
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经验:a(n)=(491/510909421717094400)*n^21+(491/4054836680294400)*n^20+(31237/4561691265331200)*n*19+(16931/72754246656000)*n=18+(6860417/12804741145600)*n#17+(5620079/62768369664000)*n_16+(28238557/24715045555200)*n~15+(460207/39626496000)*n ^14+(1996189759/20542375200 526400)*n^13+(9849852413/14485008384000)*n^12+(262128023/65840947200)*n^11+(23507656471/1207084032000)*n*10+(126607207245823/1581762915532800)*n*9+(1573022155907/5706215424000)*n ^8+(887749472755/1129830653952)*n_7+(43972723546711/2353816424000)*n^6+(1018533647929/26676557107200)*n^5+(13152985155929/2029 0951296000)*n^4+(11601438763393/1119943843200)*编号3+(5765297083043/586637251200)*编号2+(131188073/15519504)*编号。
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例子
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n=4的一些解
..0..1..2..2..3..4..4....0..1..2..3..3..4..5....0..1..2..3..3..4..5
..1..2..3..3..4..5..5....0..1..2..3..4..5..5....1..2..3..3..4..5..5
..1..2..3..4..4..5..5....1..1..2..3..4..5..5....1..2..3..4..5..5..6
..2..3..4..5..5..6..6....1..2..3..3..4..5..6....2..3..4..4..5..5..6
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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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