a(n) = phi(10^n+1), where phi is Euler's totient function (A000010).
A366669
a(n) = phi(10^n+1), where phi is Euler's totient function (A000010).
Terms
- a(0) =1a(1) =10a(2) =100a(3) =720a(4) =9792a(5) =90900a(6) =990000a(7) =9090900a(8) =94117632a(9) =681410880a(10) =9897840000a(11) =86925373920a(12) =979102080000
External references
- oeis: A366669