搜索: a251682-编号:a251682
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A251675型
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| 任何3X3子块中没有行、列、对角线或反对角线的(n+2)X(1+2)0..2数组的数目总和为2或4 |
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+10 1
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293, 489, 953, 2257, 5151, 12063, 29839, 72345, 176143, 435429, 1069885, 2629463, 6489171, 15986259, 39377317, 97110263, 239369633, 589963893, 1454573751, 3585822223, 8839317615, 21791873761, 53722460943, 132436498045, 326492433109
(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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经验公式:a(n)=2*a(n-1)-a(n-2)+11*a(n-3)-13*a(-n4)+8*a(n5)-32*a(nm-6)+16*a
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例子
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n=4的一些解
..2..2..2....1..0..0....0..1..2....2..2..2....0..0..1....1..2..2....0..1..2
..2..1..2....0..0..1....1..2..2....2..2..2....0..0..0....0..1..0....1..2..0
..2..2..2....0..0..0....2..2..1....2..2..2....0..0..0....0..0..1....2..0..1
..1..2..2....0..0..0....2..2..2....2..2..2....0..0..0....0..0..0....0..1..0
..2..2..2....0..0..0....2..2..2....2..2..2....1..1..1....0..0..0....1..0..0
..2..1..2....1..1..1....1..1..1....2..2..1....0..0..0....1..0..0....0..0..0
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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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已批准
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A251676型
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| 任何3X3子块中没有行、列、对角线或反对角线的(n+2)X(2+2)0..2数组的数目总和为2或4 |
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+10 1
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489, 865, 2089, 5065, 13031, 36075, 100307, 282489, 805963, 2300981, 6582921, 18872307, 54105547, 155166259, 445147549, 1277038995, 3663729245, 10511626757, 30158791311, 86528621567, 248262408987, 712297721821, 2043676016379
(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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经验公式:a(n)=3*a(n-1)-a(n-2)+12*a(n-3)-29*a(-n4)+a(n-5)-36*a(n6)+82*a当n>22时,a(n-19)-12*a(n-20)-8*a(n-21)
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例子
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n=4的一些解
..1..2..2..2....1..2..2..2....1..2..2..1....0..0..0..1....1..0..0..1
..2..2..1..2....2..2..2..2....2..2..2..2....0..0..1..0....2..0..1..0
..2..2..2..2....2..2..2..2....2..2..2..2....0..1..0..0....0..1..0..0
..2..2..2..2....2..2..2..2....1..2..2..2....1..0..0..1....1..0..0..1
..1..1..1..1....1..2..2..2....2..2..2..2....0..0..1..2....0..0..1..2
..2..2..2..2....2..2..2..2....2..2..2..1....0..1..2..2....0..1..2..0
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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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已批准
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A251677型
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| 在任何3X3子块中求和为2或4的(n+2)X(3+2)0..2个没有行、列、对角线或反对角线的数组的数量 |
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+10 1
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953, 2089, 5527, 16467, 54523, 184139, 632811, 2196747, 7647815, 26675183, 93098207, 325011115, 1135034003, 3964108395, 13844422191, 48352496787, 168877391803, 589827645215, 2060055442119, 7195028701059, 25129660932207
(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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经验公式:a(n)=4*a(n-1)-5*a(n-2)+24*a 17)-1252(n-18)+2364(n-19)+3587(n-20)+2284(n-21)-2954(a-22)-4508(n-23)-3564(a-24)+52(n-25)+1420(n-26)当n>37时,+1536*a(n-27)+640*a(n-28)+352*a(-n29)+192*a(n30)+128*a(n-31)+32*a(nn-32)
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例子
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n=4的一些解
..0..1..0..0..0....2..2..2..2..2....2..2..2..2..2....2..2..2..2..2
..1..0..0..1..0....1..2..2..2..2....2..2..2..2..2....1..2..2..2..2
..0..0..0..0..0....2..2..2..1..2....1..2..2..2..2....2..2..2..1..2
..0..0..0..0..0....2..2..2..2..2....2..2..1..2..2....2..2..2..2..2
..0..0..0..0..0....2..2..1..2..2....2..2..2..2..2....1..2..2..2..1
..0..1..0..0..1....1..2..2..2..1....2..1..2..2..2....2..2..2..2..2
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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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已批准
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A251678型
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| 任何3X3子块中没有行、列、对角线或反对角线的(n+2)X(4+2)0..2数组的数目总和为2或4 |
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+10 1
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2257、5065、16467、64309、264983、1116829、4748285、20262955、86674549、370897287、1587178279、6793752837、29083759187、124506509193、5330083742225、2281819402087、9768583944333、418198863365883、179033174453907
(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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经验公式:a(n)=5*a(n-1)-4*a(n-2)+20*a(n3)-52*a(-n4)-71*a(5-5)-88*a(n-17)-74685*a(n-18)-32216*a+8357*a(n-25)+153626*a 7*a(n-40)-96828*a(n-41)-39570*a当n>54时,+1224*a(n-48)+648*a(n-49)-288*a(n50)
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例子
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n=4的一些解
..2..2..2..1..2..2....0..1..0..0..0..1....0..0..1..0..0..0....1..0..0..0..0..1
..2..2..2..2..2..2....0..0..0..0..0..0....0..0..0..0..0..0....0..0..0..1..0..0
..2.2...1.2.2.2.....0.0.0.0.0.0.1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.1.0.0.0.1.0.1.1.0.0.0.0.0.0.0.0.0.0.0.0
..1..2..2..2..2..1....1..0..0..0..0..0....0..0..0..0..0..0....0..0..0..0..0..0
..2..1..2..2..2..2....0..0..0..0..0..0....1..0..0..0..1..0....1..0..0..0..0..1
..2..2..1..2..2..2....0..0..0..1..0..0....0..1..0..0..0..0....0..0..0..0..1..0
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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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已批准
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A251679号
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| 任何3X3子块中没有行、列、对角线或反对角线的(n+2)X(5+2)0..2数组的数量总和为2或4 |
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+10 1
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5151, 13031, 54523, 264983, 1374165, 7229485, 38111915, 201286237, 1064712861, 5635265205, 29825486345, 157850862859, 835509700715, 4422802653901, 23412470736607, 123932983436039, 656034364529441, 3472740407108381
(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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89阶的经验重现性(参见上面的链接)
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例子
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n=3的一些解
..1..0..2..1..2..2..1....2..2..2..2..2..2..2....2..1..0..0..0..0..0
..2..2..1..2..2..1..2....2..2..1..2..2..2..1....2..1..0..0..1..0..0
..2..1..2..2..1..2..2....1..2..2..2..2..2..2....2..1..0..0..0..0..0
..1.2.2.2.1.2.2.2.2.2.2.2.2.2.2.2.2.1.2.2.2.2.2.2.2.3.1.1.0.0.0.0.0.0.0.0
..2..2..1..2..2..2..2....2..1..2..2..2..1..2....2..1..0..0..1..0..0
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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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已批准
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A251680型
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| 任何3X3子块中没有行、列、对角线或反对角线的(n+2)X(6+2)0..2数组的数目总和为2或4 |
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+10 1
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12063, 36075, 184139, 1116829, 7229485, 47407259, 310560937, 2035481639, 13365199539, 87801989105, 576739855753, 3788602403057, 24890263396483, 163532123962817, 1074432510196251, 7059170770215635, 46379935274211457
(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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例子
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n=3的一些解
..0..0..0..0..0..0..0..0....0..0..0..0..0..1..0..0....0..0..0..0..0..0..0..0
..0..1..0..0..0..0..0..0....0..1..0..0..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..0..1..0....0..0..0..0..0..0..0..1
..0..0..0..0..0..0..0..1....1..0..0..0..0..0..0..0....0..0..0..0..0..0..0..0
..0..1..0..0..0..0..0..0....0..1..0..0..0..0..0..1....1..0..0..1..0..0..1..0
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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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已批准
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A251681型
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| 在任何3X3子块中求和为2或4的(n+2)X(7+2)0..2个没有行、列、对角线或反对角线的数组的数量 |
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+10 1
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29839, 100307, 632811, 4748285, 38111915, 310560937, 2525118941, 20534822225, 167304924269, 1363558488437, 11111887091463, 90560094584979, 738127134171193, 6016586690293155, 49042746875602219, 399756370338968651
(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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例子
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n=2的一些解
..0..0..1..0..0..1..2..0..1....0..0..0..0..0..0..0..1..0
..2..1..0..0..1..2..0..1..2....0..1..0..0..0..0..0..0..0
..1..0..0..1..2..0..1..2..0....0..0..0..0..0..0..0..0..0
..0...0..1..2...0..1..2...0..1..0...0...0..1..0...0...0...0...0...0...0
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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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已批准
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A251674型
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| 在任何3 X 3子块中没有行、列、对角线或反对角线的(n+2)X(n+2)0..2数组的数目总和为2或4。 |
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+10 0
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293, 865, 5527, 64309, 1374165, 47407259, 2525118941, 207194435581, 26296727620193, 5146601734676793, 1551231801668961273
(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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例子
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n=4的一些解
..2..0..1..0..0..1....2..1..2..2..2..1....0..0..0..1..0..2....2..2..1..2..2..2
..0..1..0..0..1..2....2..2..2..2..2..2....0..1..0..0..1..0....2..2..2..2..1..2
..1..0..0..1..2..0....2..2..2..2..2..2....0..0..0..0..0..1....2..2..2..2..2..2
..0..0..1..2..0..1....1..2..2..2..2..2....1..0..0..0..0..0....1..2..2..2..2..1
..0..1..2..0..1..2....2..2..2..2..2..1....0..1..0..0..1..0....2..1..2..2..2..2
..1..2..0..1..0..0....2..1..2..2..2..2....0..0..1..0..0..0....2..2..1..2..2..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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已批准
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