a(n) = Sum_{d|n} sigma_[n/d](d), where sigma_[k](n) is the sum of the k-th powers of the divisors of n.
A348398
a(n) = Sum_{d|n} sigma_[n/d](d), where sigma_[k](n) is the sum of the k-th powers of the divisors of n.
Terms
- a(0) =1a(1) =4a(2) =5a(3) =13a(4) =7a(5) =32a(6) =9a(7) =54a(8) =42a(9) =78a(10) =13a(11) =299a(12) =15a(13) =204a(14) =395a(15) =647a(16) =19a(17) =1626a(18) =21a(19) =2881a(20) =2565a(21) =2208a(22) =25a(23) =17070a(24) =3158a(25) =8406a(26) =20482a(27) =35607a(28) =31a(29) =116964
External references
- oeis: A348398