phi(n) is equal to the product of the dual prime-power components of n-1 (i.e., A008477(n-1)).
A039783
phi(n) is equal to the product of the dual prime-power components of n-1 (i.e., A008477(n-1)).
Terms
- a(0) =5a(1) =17a(2) =51a(3) =73a(4) =109a(5) =433a(6) =17408a(7) =21601a(8) =121501a(9) =1350001a(10) =3294173a(11) =9376762501
External references
- oeis: A039783