a(n) = n * Sum_{d|n} sigma_d(d) / d, where sigma_k(n) is the sum of the k-th powers of the divisors of n.
A344787
a(n) = n * Sum_{d|n} sigma_d(d) / d, where sigma_k(n) is the sum of the k-th powers of the divisors of n.
Terms
- a(0) =1a(1) =7a(2) =31a(3) =287a(4) =3131a(5) =47527a(6) =823551a(7) =16843583a(8) =387440266a(9) =10009772937a(10) =285311670623
External references
- oeis: A344787