a(n) = Sum_{k=1..n} k^(n/gcd(k,n)).

A342395

a(n) = Sum_{k=1..n} k^(n/gcd(k,n)).

Terms

    a(0) =1a(1) =3a(2) =12a(3) =90a(4) =1305a(5) =15713a(6) =376768a(7) =6163324a(8) =176787369a(9) =3769360335a(10) =142364319636

External references