a(n) is phi(n^n-1) where phi is the Euler totient function.
A366821
a(n) is phi(n^n-1) where phi is the Euler totient function.
Terms
- a(0) =2a(1) =12a(2) =128a(3) =1400a(4) =30240a(5) =264992a(6) =6635520a(7) =141087744a(8) =5890320000a(9) =114117380608
External references
- oeis: A366821