a(n) = sigma_n(n^2): sum of n-th powers of divisors of n^2.

A062755

a(n) = sigma_n(n^2): sum of n-th powers of divisors of n^2.

Terms

    a(0) =1a(1) =21a(2) =757a(3) =69905a(4) =9768751a(5) =2214363531a(6) =678223896393

External references