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(来自的问候整数序列在线百科全书!)
A252192号 T(n,k)=(n+2)X(k+2)0..3数组的数目,每个3X3子块的行和列的和等于0 1 3 6或7,每个3X1对角线和反对角线的和不等于0 1 36或7 9
945, 1440, 1440, 2055, 1886, 2055, 3341, 2610, 2610, 3341, 5300, 3996, 3705, 3996, 5300, 7973, 6368, 5460, 5460, 6368, 7973, 13044, 9508, 8945, 9233, 8945, 9508, 13044, 21238, 15094, 13737, 14130, 14130, 13737, 15094, 21238, 32234, 24092, 20974, 21417 (列表;桌子;图表;参考;;历史;文本;内部格式)
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表格开始
...945..1440..2055...3341...5300...7973..13044...21238...32234...53032....87440
..1440..1886..2610...3996...6368...9508..15094...24092...36352...58610....94310
..2055..2610..3705...5460...8945..13737..20974...34209...53194...82196...134418
..3341..3996..5460...9233..14130..21417..34532...55336...84332..135776...218896
..5300..6368.8945.14130.24956.37035.57284…99128.151616..245908…420808
..7973..9508.13737..21417..37035..57629..87230..150297..239980..380896...661172
.13044.15094.20974..34532..57284..87230.147696..246676..385720..640208..1157336
21238.24092.34209.555336.99128.150297.246676.488200..772384.1382480.3132872
.32234.36352.53194..84332.151616.239980.385720..772384.1339760.2298824..5554000
.53032.58610.82196.135776.245908.380896.640208.1382480.2298824.4201296.12409744
链接
配方奶粉
k列的经验值:
k=1:n>30时[24阶线性递归]
k=2:a(n)=7*a(n-3)-14*a(n-6)+8*a(n-9),对于n>16
k=3:a(n)=7*a(n-3)-14*a(n-6)+8*a(n-9),对于n>15
k=4:a(n)=7*a(n-3)-14*a(n-6)+8*a(n-9),对于n>17
k=5:a(n)=15*a(n-3)-70*a(n-6)+120*a(n9)-64*a(-12),对于n>22
k=6:a(n)=15*a(n-3)-70*a(n-6)+120*a(n9)-64*a(-12),对于n>21
k=7:a(n)=15*a(n-3)-70*a(n-6)+120*a(n9)-64*a(-12),对于n>23
例子
n=4k=4的一些解
..3..1..2..3..1..2....3..3..0..3..3..0....3..2..1..3..2..1....2..0..1..2..0..1
..0..0..3..0..0..0....1..2..0..1..2..3....0..1..2..3..1..2....0..0..3..3..0..3
..3..2..1..0..2..1....2..1..0..2..1..3....0..3..0..0..0..0....1..3..2..1..0..2
..0..1..2..3..1..2....3..3..0..0..0..0....0..2..1..3..2..1....2..3..1..2..0..1
..3..3..0..0..0..3....1..2..3..1..2..0....3..1..2..0..1..0....3..0..0..0..0..3
..3..2..1..3..2..1....2..2..3..2..1..0....3..0..3..0..3..0....1..0..2..1..3..2
交叉参考
关键词
非n
作者
R.H.哈丁2014年12月15日
状态
经核准的

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