a(n) = Sum_{k=1..n} (n/gcd(k,n))^(n-2).
A342412
a(n) = Sum_{k=1..n} (n/gcd(k,n))^(n-2).
Terms
- a(0) =1a(1) =2a(2) =7a(3) =37a(4) =501a(5) =2771a(6) =100843a(7) =1056833a(8) =28702189a(9) =401562757a(10) =23579476911a(11) =247792605523
External references
- oeis: A342412