Alternating sum phi(1) - phi(2) + phi(3) - phi(4) + ... + ((-1)^(10^n+1))*phi(10^n).
A375020
Alternating sum phi(1) - phi(2) + phi(3) - phi(4) + ... + ((-1)^(10^n+1))*phi(10^n).
Terms
- a(0) =1a(1) =6a(2) =970a(3) =101130a(4) =10129180a(5) =1013176996a(6) =101320714074
External references
- oeis: A375020