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评论
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行总和为:
{2, 4, 8, 24, 96, 576, 5184, 72576, 1596672, 55883520, 3129477120,...}.
如果您选择:
以H(i)作为量子磁场:
乘积[1+H(i)*x,{i,0,n}]
得到的序列是斯特林数。
使其对称:
p(x,n)=乘积[1+H(i)*x,{i,0,n}]+x^n*乘积[1+H(ii)/x,{i,0,n}]
现在,你可以放入任意一个a(n)序列,得到一个对称的
多项式返回。
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例子
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{{2},
{2, 2},
{2, 4, 2},
{3, 9, 9, 3},
{7, 24, 34, 24, 7},
{31, 103, 154, 154, 103, 31},
{241, 778, 1055, 1036, 1055, 778, 241},
{3121, 10127, 12957, 10083, 10083, 12957, 10127, 3121},
{65521, 215148, 274724, 184020, 117846, 184020, 274724, 215148, 65521},
{2227681, 7378804, 9521213, 6204407, 2609655, 2609655, 6204407, 9521213, 7378804, 2227681},
{122522401, 408057203, 530891673, 348306220, 128955206, 52011714, 128955206, 348306220, 530891673, 408057203, 122522401}
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