登录
A372791型
a(n)=τ(11*n)=A000005号(11*n)。
10
2, 4, 4, 6, 4, 8, 4, 8, 6, 8, 3, 12, 4, 8, 8, 10, 4, 12, 4, 12, 8, 6, 4, 16, 6, 8, 8, 12, 4, 16, 4, 12, 6, 8, 8, 18, 4, 8, 8, 16, 4, 16, 4, 9, 12, 8, 4, 20, 6, 12, 8, 12, 4, 16, 6, 16, 8, 8, 4, 24, 4, 8, 12, 14, 8, 12, 4, 12, 8, 16, 4, 24, 4, 8, 12, 12, 6, 16
抵消
1,1
链接
配方奶粉
Sum_{k=1..n}a(k)~(21*n*(log(n)+2*gamma-1)+n*log(11))/11,其中gamma是欧拉-马斯切罗尼常数A001620号.
数学
表[DivisorSigma[0,11*n],{n,1,150}]
关键词
非n
作者
状态
经核准的