a(n) = Sum_{ composite k, 1 <= k <= 10^n} (Number of divisors d of k with 1 < d < k).
A136364
a(n) = Sum_{ composite k, 1 <= k <= 10^n} (Number of divisors d of k with 1 < d < k).
Terms
- a(0) =8a(1) =283a(2) =5070a(3) =73669a(4) =966751a(5) =11970035a(6) =142725365a(7) =1657511569a(8) =18877697635a(9) =211802823221
External references
- oeis: A136364