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1, 1, 1, 5, 5, 9, 29, 37, 57, 89, 265, 309, 521, 745, 1129, 3005, 3545, 5685, 8201, 12265, 16629, 41369, 48109, 77265, 107645, 160681, 214861, 316913, 644837, 798861, 1207445, 1694269, 2437689, 3326705, 4710397, 6270513, 12246521, 14853625, 22244569, 30308033, 43706705, 57926577, 82166105, 107873221, 148081785, 257989961, 320873065, 458994657, 628016225, 875485585, 1165065733
(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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0.4
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评论
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n的合成是正整数与n之和的有限序列。
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链接
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例子
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a(0)=1到a(5)=5拆分:
() (1) (2) (3) (4) (5)
(12) (13) (14)
(21) (31) (23)
(1)(2) (1)(3) (32)
(2)(1) (3)(1) (41)
(1)(4)
(2)(3)
(3)(2)
(4)(1)
a(6)=29分裂:
(6) (1)(5) (1)(2)(3)
(15) (2)(4) (1)(3)(2)
(24) (4)(2) (2)(1)(3)
(42) (5)(1) (2)(3)(1)
(51)(1)(23)(3)(1)(2)
(123) (1)(32) (3)(2)(1)
(132) (13)(2)
(213) (2)(13)
(231) (2)(31)
(312) (23)(1)
(321) (31)(2)
(32)(1)
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数学
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splits[dom_]:=Append[Join@@Table[Prepend[#,Take[dom,i]]和/@splits[Drop[dom,i]],{i,Length[dom]-1}],{dom}];
表[Sum[Length[Select[splits[ctn],UnsameQ@@Total/@#&]],{ctn,Join@@Permutations/@Select[IntegerPartitions[n],UnsameQ@#&]}],{n,0,15}]
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交叉参考
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囊性纤维变性。A006951号,A063834号,A271619型,A279375型,A305551型,第362519页,A317508型,A318684型,A336133型,A336134飞机,A336135型。
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关键词
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非n
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作者
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扩展
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状态
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经核准的
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