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362156美元 |
| {1..n}的非空子集的数目,其乘积可被其和整除。 |
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13
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0, 1, 2, 4, 5, 10, 19, 34, 64, 129, 267, 541, 1104, 2253, 4694, 9804, 18894, 38539, 76063, 155241, 311938, 636120, 1299869, 2653853, 5183363, 10272289, 20958448, 40945577, 81745769, 167048919, 329598054, 671038751, 1301431524, 2618590422, 5305742557, 10582105199, 20660489585, 42075929255, 85443680451, 172057673225, 338513788818
(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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0,3
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链接
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例子
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a(1)=1到a(6)=19个子集:
{1} {1} {1} {1} {1} {1}
{2} {2} {2} {2} {2}
{3} {3} {3} {3}
{1,2,3}{4}{4}{4}
{1,2,3} {5} {5}
{1,2,3} {6}
{1,4,5} {3,6}
{2,3,5} {1,2,3}
{3,4,5} {1,4,5}
{1,2,3,4,5} {2,3,5}
{2,4,6}
{3,4,5}
{4,5,6}
{1,2,3,6}
{1,3,5,6}
{3,4,5,6}
{1,2,3,4,5}
{1,2,3,4,6}
{2,3,4,5,6}
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数学
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表[Length[Select[Subsets[Range[n],{1,n}],Divisible[Times@@#,Plus@@#]&]],{n,0,10}]
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交叉参考
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囊性纤维变性。A053632号,A057567号,A057568号,A059529号,A063865号,A301987年,A326150型,A326151型,A326153型/A326154型,362155美元,A326158型,A326178型,362179美元,A326180型.
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关键字
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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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