#来自在线整数序列百科全书的问候!http://oeis.org/; 搜索:id:a214851 展示1-1 of 1 ;%I a214851;%S a214851 0,1,1,1,0,0,1,3,2,0,0,0,3,2,0,0,0,1,2,0,0,0,1,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0;0;0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,,0,1450184,0,0,85,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,N a214851不规则三角形数组,按行读取。T(n,k)是具有k平方根的n-置换的数目。n>=1,0<=k<=A000085(n);%C A214851行和=n!。%C A214851和{k=1…a00085(n)}T(n,k)*k=n!。%C A214851和{k=1…a00085(n)}T(n,k)=A003483(n);%C A214851列k=0为n!-(n)。%e A214851 1 1,0,0,1,;%e A214851 1 1,0,1,;%e A214851 3,2,0,0,0,1,;%e A214851 12,8,3,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 51 450,184,0,0,85,0,0,0,…,1,其中1在k=76列中。 %e A214851 T(5,2)=35,因为我们有20个类型(1,2,3)(4)(5)和类型(1,2)(3,4)(5)的15。它们有2个平方根:(1,3,2)(4)(5),(1,3,2)(4,5)和(1,3,2,4)(5),(3,1,4,2)(5)。 %t A214851(*警告:代码效率很低,在笔记本电脑上运行大约需要一分钟。*)a={1,2,4,10,26};表[分布[表[乘法表[排列[m],排列[#1,#2]&][[n]][[n]],{n,1,m!}],射程[1,m!]],Range[0,a[[m]]],{m,1,5}]//Grid %Y A214851 Cf.A214849(列k=1),A214854(列k=2)。 %k A214851 nonn,tabf %O A214851 1 1,6 %a A214851 %a A214851 Geoffrey Critzer_,2013年3月8日 # # 根据OEIS最终用户许可协议提供内容:http://