a(n) = Sum_{k=1..n} k^(n/gcd(k,n) - 1).
A342396
a(n) = Sum_{k=1..n} k^(n/gcd(k,n) - 1).
Terms
- a(0) =1a(1) =2a(2) =6a(3) =31a(4) =355a(5) =3150a(6) =67172a(7) =904085a(8) =22998481a(9) =427799450a(10) =14914341926a(11) =287337926355
External references
- oeis: A342396